Assault Synchron [BLMR-EN003] Quarter Century Secret Rare BT18-143 Rose Room Treasurer deals X

Rose Room Treasurer deals X damage to any target

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Set: Dominaria Remastered Type: Instant Rarity: Rare Cost: {U} Search your library for an instant or sorcery card

Set: Unknown Event Type: Creature — Phyrexian Knight Rarity: Common Cost: {B}{B} First Strike

then can Tribute all their monsters

Assault Synchron [BLMR-EN003] Quarter Century Secret Rare BT18-143 Rose Room Treasurer deals XSet: Battles of Legend: Monstrous Revenge Card type: Tuner Effect Monster Rarity: Quarter Century Secret Rare Attack: 700 Defense: 0 During your Main Phase: You can Special Summon this card from your hand, then take 700 damage, also while it is face up in the Monster Zone, you cannot Special Summon from the Extra Deck, except Synchro Monsters. If a face up Dragon Synchro Monster(s) you control is Tributed or banished (except during the Damage Step):