mtg arena how to find invalid cards Why is my MTG Arena deck invalid?

burn through cards and grow your mummy army with this White-Blue-Black Aetherdrift Commander deck 2 FOIL BORDERLESS COMMANDERSEvery Aetherdrift Commander Deck includes 2 Traditional Foil Legendary Creature cards featuring Borderless art INTRODUCES 10 COMMANDER CARDSEach deck introduces 10 never-before-seen Commander cards to Magic: The Gathering COLLECT SPECIAL TREATMENT CARDSEach deck also comes with a 2-card Collector Booster Sample Pack containing 2 alternate-border Aetherdrift cards THRILLING MULTIPLAYER BATTLESCommander is a multiplayer way to play Magic, an epic, free-for-all battle full of strategic plays and social intrigue CONTENTS1 ready-to-play Eternal Might Aetherdrift MTG Commander Deck (100 cards), a 2-card Collector Booster Sample Pack, 10 double-sided tokens, and 1 deck box

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1 Collective Resistance

Put a charge counter on Ice Cauldron and note the type and amount of mana spent to pay this activation cost