Season IIPolar World

My base is freezing

Below -20°C a five-minute countdown starts. When it ends your base freezes: no advanced relocation, no rallies. Alliance and random teleport still work.

• Turn the High-heat Furnace on. Switch to Overdrive if the furnace alone isn't enough — Overdrive burns four times the coal, so turn it off after.
• Ask allies for a Recon Plane. Each one is +2°C and costs the sender 100 Coal.
• Relocate into Alliance Furnace range, or into a captured city — a captured city's territory sits at -10°C.
• To thaw: hold above -20°C for five unbroken minutes. Any dip below resets the timer. Allies can also break the ice — five hits at 5 stamina each.

I'm doing no damage to a monster

Read the red line on the monster's card. It shows your Virus Resistance against the requirement, and the exact penalty.

• A Level 1 Digging Stronghold is guarded by a Level 10 beast needing 3,500 Virus Resistance. At 450 of 3,500 you deal 99.9% less damage.
• Virus Resistance comes from upgrading your High-heat Furnace. The Weekly Pass adds a temporary +250.
• The rally leader's Virus Resistance is applied to every member with a lower number. Have your highest-resistance ally lead.
• Check your own number in Status Overview.

We're capturing a Digging Stronghold

Kill the guardian beast, then reinforce. First alliance to 100% within four hours wins it.

• Match your squad to the beast. Gorilla is Aircraft — hit it with Missile. Bear is Missile — hit it with Tank. Mammoth is Tank — hit it with Aircraft.
• The beast may be frozen. Send squads to unfreeze it before you rally.
• Highest Virus Resistance member starts the rally. Up to 10 squads reinforce.
• Everyone touches it. Reinforcing for two seconds earns the first-capture participation reward.
• After capture it holds 36 hours of protection. You can capture two per day and hold four total.

A cold wave is coming

A cold wave is income, not just a threat. A Level 1 Blizzard drops the whole server by -10°C.

• Three tasks pay 4,000 Coal each — 12,000 Coal total, for a few minutes of work.
• Make one season or Alliance donation.
• Warm three allies. That costs you 300 Coal and returns 4,000.
• Keep your High-heat Furnace running for 600 seconds.
• Claim from the Cold Wave panel's Goals button — there is no red-dot notification.

What changed from Season 1

Temperature is the layer underneath everything else this season. It decides your production, your healing, your morale, and whether you can rally at all. Heat sources add together — read your Location tab and the arithmetic is right there.

The buff ladder

Forty and fifty are identical. Buffs stop climbing at 40°C. Anything above that is wasted coal, and at 50°C or above your base enters Burning State and loses durability. Target 40°C and hold it.

Heat sources

Worked example from a live base: Thaw Area Lv.1 at -15.0, plus High-heat Furnace Lv.2 at +6.0, plus Tower of Victory Lv.3 at +5.0, gives a final -4.0°C.

Freezing

• Below -20°C a five-minute Freezing Soon countdown begins.
• When it ends the base is frozen: advanced relocation and rallies are blocked. Alliance and random teleport still work.
• To thaw, hold above -20°C for five unbroken minutes. Any dip below -20°C restarts the count.
• Allies can break the ice instead — five hits at 5 stamina each.
• Your Goals tab tracks Base Non-Frozen Time and Total Frozen Time as season metrics.

Burning

• At 50°C or above, sustained, the base catches fire and loses durability slowly.
• A Base Almost on Fire warning state gives you a burn timer to cool down inside.
• There is a Disable the Base About to Catch Fire toggle in the Boost Temperature panel. Use it.
• The Eternal Frost Castle decoration makes the base immune to burning while held in stock — it does not need to be equipped.

Cold waves

• A Level 1 Blizzard changes the temperature across the entire server by -10°C. Higher levels drop further.
• Cold waves are announced in advance with a countdown on the Cold wave incoming panel.
• Three tasks pay 4,000 Coal each: one season or Alliance donation, warm three allies, keep the furnace running 600 seconds.
• Set the furnace to auto-ignite before a wave. Switch to Overdrive during, and back to normal after.
• Claim from the Goals button on the event panel. There is no red-dot notification.

Traps

Coal fuels your furnace and builds your factories. Titanium Alloy upgrades your furnace, which is what raises Virus Resistance. Everything in Season II runs through this loop: Coal buys factories, factories make Titanium, Titanium raises the furnace, the furnace unlocks the content that pays more Coal.

Where Coal comes from

• First-time kills at each level — zombies, Doom Elites and Doom Walkers. This is the big one.
• Digging Strongholds produce Coal hourly. A Level 1 gives 2,736/h, a Level 6 gives 3,456/h. Claim from Alliance → Alliance City → Dig Sites → Claim all.
• Cold wave tasks — 12,000 Coal per wave across three tasks.
• Season quests, Distressed Survivor radar missions, and gate visitors.
• Hero's Return Recruitment Tickets saved from Season 1. Use them all at season start.
• Polar Dishes — roughly 65,000 Coal for a correctly fed Snowflake meal.
• Weekly Pass and Season Battle Pass.

First kills are the engine

• Rotate rally leadership. Whoever has not yet claimed that level takes the lead.
• A low-resistance member can lead with a single weak hero squad while high-resistance allies join and do the damage — they still claim the first-kill reward for a level they could never solo.
• Remember the rally leader's Virus Resistance is applied to every lower-resistance member, so leader choice cuts both ways. For a beast kill you want your highest; for a first-kill claim you want whoever needs it.
• Kill the highest level you can, every single day.

The radar search panel shows a First time leading to kill reward at every level. A Level 1 Doom Elite alone pays 50 gems, 2 gold badges, 5,000 Titanium Alloy and 30,000 Coal. The reward goes to whoever LEADS the rally.

The Alliance Furnace

Fifty donations a day, not five. Five is only the daily-quest minimum. Uptime is also tied to alliance season goals, so keep it burning.

Titanium Alloy Factories

• Each factory unlocks the next when it reaches Level 15. Four total, plus a fifth while the Weekly Pass is active.
• Every level adds a flat +720/h regardless of which level you're upgrading to — so always upgrade your LOWEST factory first.
• Get all of them to 15, then all to 16, then all to 17. Never run one far ahead.
• If your Weekly Pass factory shows a cheaper upgrade cost than the others, upgrade that one.
• Maximum level 30, regardless of your HQ level.

Cut your costs before you spend

• Master Craftsman research — building cost reduction.
• Alliance tech Veteran Craftsman — its description only mentions food, iron and gold, but it also reduces Coal and Titanium costs. Most alliances skip it for that reason. Don't.
• Engineer Level 35 Resource-Saving, up to -5%.
• Double Exchange (season skill, Level 20) converts 25,000 Coal into 50,000 Titanium Alloy.

Traps

Digging Strongholds are your Coal engine and half your Rare Soil. Your alliance's first territory must be a Level 1 Digging Stronghold — everything else expands outward from it, and territories connect at their corners as well as their edges.

Virus Resistance gates

Under the requirement you deal up to 99.9% less damage. The monster's card shows your number against the requirement in red — teach every member to read it before they march. Resistance beats power: a well-resisted 25M squad beats an under-resisted 30M squad.

Know your beast

An alliance built on Tank squads should aim its first capture at a Bear.

Capture sequence

• The beast may be frozen. Send squads to unfreeze it before rallying.
• Multiple rallies are needed — each hit removes a percentage of its health.
• Once the beast dies, reinforce the site. Up to 10 squads.
• First alliance to 100% wins it. The window is four hours; fail and it stays with whoever held it.
• Captured sites hold 36 hours of protection and spawn Dig Site Guards.
• Two captures per day, four held at once. Completing your second capture kicks your squads off any third site you were reinforcing.

Rewards and participation

• First capture of a Level 1 pays 50 gems and 10,000 Coal, plus 10 Alliance Loot chests distributed by R5 or the Butler.
• Production at Level 1: 100/h Rare Soil and 2,736/h Coal. At Level 6: 150/h Rare Soil and 3,456/h Coal.
• Participation qualifies on any of three things — joining a rally with a real squad, starting or joining with one weak squad, or reinforcing the site for two seconds.
• Nobody should ever miss a first capture. It is nearly free.

Digging Stronghold Clash

• Ranks your alliance on the highest-level Digging Stronghold it captures. Ties break in favour of whoever captured earlier.
• Settled daily. Rewards arrive by mail a few minutes after settlement.
• Be aware this pulls against the season's cumulative Rare Soil race — the Clash rewards going deep fast, the season rewards holding production early and long. Decide which one your alliance is playing for and say so out loud.

Traps

Cities are the bigger half of your Rare Soil income and the only thing that warms the ground around them. They unlock on a fixed schedule through the City Clash event — you cannot take a level before it opens, no matter how strong you are.

Unlock calendar

Watch the City Clash countdown rather than a clock time. The four Level 6 cities sit north, east, south and west of the Capitol. The Capitol itself does not count against your six.

Rare Soil production

Compare that to a Digging Stronghold's 100–150/h and the priority is obvious. Cities carry your season score; strongholds carry your Coal.

Capture rules

• You need an adjacent Digging Stronghold before you can declare on a city. R4/R5 declare.
• Two declarations per day, but only one city targeted at a time.
• Troops take toxin damage during sieges and a portion of units die outright. Virus Resistance reduces it.
• First-time capture pays participants, all members get city rewards, and the alliance gets Loot chests distributed by R5 or the Butler.
• After capture the city is protected for roughly six days. Abandoning does not reset that countdown, and you cannot re-declare on a city you abandoned for about five days.
• No cross-warzone city captures in Season II.

The Day 3 call

When Level 1 cities open on Day 3, do not push deeper for a higher-level stronghold. Expand sideways. From a well-placed start you should finish Day 3 holding three Level 1 Digging Strongholds and two Level 1 cities. Cities give you Rare Soil income and warm the ground; the extra strongholds give you Coal and a buffer. You are building the infrastructure that lets you hold a Level 3 later, instead of taking one you cannot defend now.

Traps

Start Season II as Engineer. Every season building you need is expensive and Engineer makes them cheaper and faster. Switch to War Leader when the building phase is done and the war phase starts — around Week 3 or 4. The season level cap is 70.

Three professions

• Engineer — cost reduction, build and research speed, siege durability damage. Run this first.
• War Leader — combat, marches, garrison, training speed. Switch for the war phase.
• Diplomat — present but locked. Unlock conditions unknown; no guide anywhere documents it yet. We will publish it as soon as we can read it.
• Note: 'Warlord' in Rare Soil War means the alliance title held by one player, not this profession.

The seasonal column

The seasonal column is a single linear chain — you cannot skip a skill to reach the one above it, including the cosmetic one. Every point in it refunds at season end, so spend freely down the chain. Prioritise the EXP skills first: they compound into everything else.

Permanent tree priorities

• Level 35 Resource-Saving, five ranks — up to -5% on construction cost. Max it before you upgrade season buildings.
• Level 30 Cooperative Construction and Cooperative Research.
• Level 20 Siege Banner — this is the Charge Banner, covered below.
• There is no skill called Eco-Friendly Construction. If you have read that elsewhere, it was Resource-Saving under a wrong name.

Charge Banner

A banner boosts the Attack of friendly troops within its range by 2%, and it stacks up to five times. Five members dropping banners together is +10% attack for everyone inside the range — not one person's +2%. Coordinate it before a siege or a Rare Soil War push. Most alliances never stack it.

When to switch to War Leader

• Switch when your High-heat Furnace and all Titanium factories are established and your resistance clears your current target.
• Profession Change Certificates come from the Luxury Season Battle Pass. Plan for one clean switch.
• Switching refunds and resets all your points, so do it deliberately, not mid-week.

Traps

The squad counter triangle is unchanged: Tank beats Missile, Missile beats Air, Air beats Tank. What changes in Season II is Violet's promotion to UR and three exclusive weapons arriving on a fixed schedule.

Violet — read this before you spend

• Requires Violet at 5★ plus the Legendary Hero Badge, which comes from the season goal for reaching High-heat Furnace Level 30 — your personal furnace, not the Alliance Furnace.
• The promotion event opens Week 3 Day 1 and runs 35 days.
• On promotion she resets to 3★ and all her skills reset to Level 1 with a new skill set. Her hero level is kept. Wall of Fame buffs are lost.
• Refunded: every skill medal you spent on her, and all Wall of Honor shards — returned as Violet shards.
• NOT refunded: the shards you spent taking her to 5★. And re-promoting from 3★ back to 5★ costs double — about 1,600 shards.
• Skill medals on an SSR cost about 90% of what a UR costs, so your refund will not restore the same skill levels.
• Her season boost: reduces damage taken from monsters by 5%.

This is a reset with a partial refund, not a free upgrade. Plan the shard cost before you start, not after.

Exclusive weapons

Each battle pass gives 70 named shards. Activation needs 50 named shards and the hero at 5★. Universal Exclusive Weapon Shards can only LEVEL a weapon after activation — they cannot activate one. Weapons go to Level 30 and raise that hero's skill cap to 40.

Squad counters

• Tank beats Missile. Missile beats Air. Air beats Tank. Roughly 20% either way.
• A counter advantage is worthless if you are under the Virus Resistance requirement. Resistance first, matchup second.
• Morrison's physical damage bypasses air energy resistance — useful against frozen bosses.
• Mason still boosts back-row tank damage against monsters by 25%. Keep him for world boss days.

Season Boost

• Eternal Frost Castle, held in stock: your base won't burn at high temperature, and a successful attack lowers the enemy base's temperature by 3°C. Liking the base gives a Frost Gift, one per base per commander.
• Christmas Hunter, equipped: march speed +10%.
• Tower of Victory: +3/+4/+5°C by level, and it unlocks additional burning effects.
• Violet: -5% damage taken from monsters.

The Eternal Frost Castle's -3°C on a successful attack is a weapon nobody talks about. Chained attacks can push a defender toward the -20°C freeze line.

Traps

From Week 4 the Alliance Furnace stops being a heater and becomes a target. Rare Soil War is faction against faction, twice a week, eight rounds, and it is the only way Rare Soil changes hands. Attackers who win plunder up to 20% of a defender's stock — 30% after the Week 6 Showdown.

Factions

• Faction Awards opens Monday at reset in Week 3 and the selection phase runs three days.
• Two factions — Rebels and Gendarmerie — of exactly four warzones each.
• Warzone Presidents choose. If a faction is full, Force Join pushes a random warzone out into the other faction. Twelve-hour cooldown per warzone.
• Identities stay hidden unless a President reveals them. Everything goes public on Day 4.
• The two strongest warzones are automatically split as faction leaders — they cannot be on the same side.

The weekly cycle

Ranking groups recalculate every round, and only alliances that hold a furnace can be attacked.

The Warlord Missile

• Only the player holding the Warlord title in an attacking alliance can launch it, and only at a point inside the defender's Alliance Furnace range.
• Three-minute launch window. The Warlord enters War Fever and their base is revealed to the entire server — anyone, from any warzone, can attack it.
• If that base is relocated or breached during those three minutes, the launch fails and goes on a 72-hour cooldown.
• On success: every base in a 25×25 area is relocated to a random map position. Shields are not broken, but bases and the furnace take durability damage.
• The blast zone becomes Contaminated Land for one hour. No shields can be raised inside it, and those bases can be attacked on Wednesday as well as Saturday.
• Each attacking alliance gets its own missile.

Defending the furnace

• Do not group around the furnace. The missile will scatter everyone at once. Stay several base-widths clear.
• If a missile is inbound, teleport out of the red zone before the countdown ends.
• Set the alliance assembly point near the furnace but outside the blast radius so scattered members can come back fast.
• The furnace holds 100 squads — one per base.
• Warm each other while garrisoning. It heals faster and lifts morale.
• Wednesday: only bases inside contaminated land can be attacked. Saturday: any base, anywhere.

Scoring

• Your alliance is ranked on total Rare Soil accumulated across the season, not what you hold at the end.
• Winning attackers plunder up to 20% of the defender's stock — 30% from Week 6. Defence partners lose nothing.
• Multiple attackers split the plunder by how much furnace durability each one removed.
• Eight reward tiers by final rank: 1st, 2nd–3rd, 4th–10th, 11th–20th, 21st–50th, 51st–80th, 81st–120th, 121st–999th.
• Faction rewards require your High-heat Furnace at Level 20 or above.
• Territories lock at the start of Week 8.

Traps

Season II runs on top of the VS week, not instead of it. Every day now has two jobs.

Newly live on Server 2132. A weekly Thursday event in the Secret Command Post, and the main source of shards for several heroes you cannot get elsewhere. It runs regardless of season.

Rules that cost you if you miss them

• Claim rewards the moment a mission ends. Unclaimed rewards show as green icons on the world map and anyone can plunder them.
• Enable Volunteer Mode BEFORE your third assist is used, not after. It won't apply retroactively.
• Turn on Smart Mode for UR★ runs — it auto-starts the moment conditions and squad are met.
• Your heroes lock for the mission duration. Plan Thursday around that.
• Coordinate UR★ squads before Thursday. The hero requirements are not something you assemble on the day.

Passive income that compounds all season. Supplies only appear where the ground temperature reaches 0°C or above.

• Five reclaims per day.
• Raise ground temperature with a captured city's heat, a relocated Alliance Furnace in Overdrive, or a Level 3 Firebomb.
• Frozen supplies need the ice broken — 1,000 durability per hit at 5 stamina each — or just warm the ground above 0°C.
• Up to 12 alliance members can claim from each crate.
• Supply locations are fixed and identical across servers.