Co-op Mode and Rumble Chess

Co-op Mode: rewards Taking on Co-op stages with another player earns rewards based on how many rounds you both survive together. Clearing every round of a stage also grants Completion Rewards (the first one resets weekly). You can invite other players through chat, or use AI Co-op if you can't find a partner (though Co-op help won't be available in that case). If you run out of Attempts, you can still use Helps to join other players' games and earn some rewards — both Attempts and Helps reset daily. Instant Tickets complete a Co-op match instantly, granting rewards equal to your highest round reached that day (and they also consume an Attempt). Co-op Mode: helping You can help your teammate by dragging a Shop Minion into a "help" slot each round — that Minion is free for your teammate. They can do the same for you, and you then drag the received Minion onto your own field. Co-op Mode: match rules Co-op gives you 12 field slots, more than other modes. Your teammate's Minions have blue stars and can't merge with yours (but they can merge with other blue-star Minions). Rumble Chess: basic rules You face 7 other players in random matchups. Whoever hits zero HP is eliminated immediately, and rank is decided by elimination order — higher placements earn more Rumble Trophies and Rumble Medals. Rumble Trophies raise your rank on the Rumble Track; Rumble Medals unlock rewards from the Rumble Pass. Both reset every season. Rumble Chess: decks Each season offers 6 possible decks, and each match randomly picks 3 of them for players to use. Every card has a limited quantity shared across all players in the match — once it runs out, no one can buy it until someone sells it (returning it to the pool) or is eliminated (returning everything they bought). In Rumble Chess you can use cards you haven't even unlocked in normal mode yet, and any levels you've already reached with a card carry over (with a guaranteed minimum level for new cards). Rumble Chess: 4★ Minions Merging two 3★ Minions creates a 4★ Minion — this only exists in this mode. 4★ Minions are much stronger than 3★ ones, sometimes strong enough to decide the match on their own. Generally, 4★ Cost 5 Minions tend to be stronger than 4★ Cost 3 ones, while 4★ Cost 8 Minions tend to be decisive. Rumble Chess: HP absorption When your Attack Units damage the enemy Commander, they drop HP onto the field — if you survive the round, your Commander absorbs that extra HP. This doesn't happen during Boss rounds, during the final phase (once only two players remain), or against an enemy already defeated in another battle that match. Your Commander's max HP in this mode is capped at 200, no matter how much you absorb. Rumble Chess: deck synergy Buying Minions from the same deck (of the 3 drawn for the match) builds up Synergy Points for that deck. Reaching certain Synergy Levels activates Synergy Effects, which get stronger at higher levels. A 1★ Minion is worth 1 Synergy Point, and a 3★ one is worth 4 (the same number of 1★ Minions needed to merge into it). Selling a Minion on the field removes its Synergy Points — which can deactivate effects that were already active.