Co-op 4 changed with the Oct 27 update.
Full context
Co-op 4 changed with the Oct 27 update. On Oct 29, NoControlTower played the new stage on a strong account (1,800% Power) and found it easy, enough to recommend it for weaker accounts. The change is in two special slots on the board. Below: what each one does, when to use it, which card to carry with and the wiki's math on how much ATK you can bank.
THE TWO NEW SLOTS
- Solidify: every Ready, the Aura ATK bonus the Minion in this slot receives becomes permanent.
- Contract: every Minion in this slot that defeats an enemy gains 2 Suncoins. The effect lasts only 2 rounds.
WHEN TO USE EACH ONE
- Solidify right at the start of the match, with an Aura card already giving ATK to your main card. The earlier, the more Readies it adds up.
- Contract on round 5, which brings many enemies, and it still pays on round 6. According to the creator, using it on other rounds gives much less Suncoin.
THE WIKI'S MATH
Details and source
The two Aura cards the creator uses are Leeky Beats, which gives +2/4/8 ATK to neighboring Minions in the same row and column, and Cheerbloom, which gives +2/4/8 to the Minion right above it (official text). The creator says the main card on Solidify keeps building damage through the match, which means the bonus stacks every Ready. If so, a main card with Leeky Beats and Cheerbloom, both at 3★, banks +16 ATK per Ready. Over 8 Readies, that's +128 ATK that doesn't go away at the end of the round. On his account, with high-level cards, the Auras gave 80 (Leeky Beats) and 52 (Cheerbloom).
WHICH CARD TO CARRY WITH
- According to the creator, the best is Pop Gunner: it breaks the Shield and kills the Bosses. If you have Pop Gunner I, use the Variant; if not, the regular one works.
- Also fine: Apple Sheriff, which kills Bosses well but struggles against single targets, Orange Bros with strong clones, Violet Magus, Sir Rose II and Banana-rang.
- Stacked attack speed turns Pop Gunner into a machine gun: the creator says it reached 400. Bardcore Onion gives ATK SPD to every Minion.
THE CATERPILLAR BOSS
Details and source
The stage's Boss kills the strongest card on your board. The creator's tip is to bring extra Pop Gunners to break its Shield fast. Wiki analysis: it's the same family of rule as Queen Wasp in the Club Points Race and the Oct 12 Boss: having more than one strong Minion, or a Temp. clone up front, keeps you from losing the card that carries everything.
REWARDS
According to the creator, the weekly legendary rewards give +5 recruits and +5,000 gold a week. For the rest of the co-op mode, see the Co-op and Rumble Chess guide.
Details and source
Source: NoControlTower's video from Oct 29, 2026 () and the cards' official text. The banked ATK math is mine and assumes the bonus stacks every Ready, as the creator describes; we haven't checked it in the game yet.