Mnemonic Betrayal [Guilds of Ravnica] FAB062 put a -1 [Defense] counter

put a -1 [Defense] counter on it when combat chain closes then destroy it if it has 0 [Defense])

Roll X six-sided dice

Set: International Collectors' Edition Type: Enchantment Rarity: Rare Cost: {3}{R} Whenever a player taps a land for mana

each opponent can't block with more than one creature this combat

Mnemonic Betrayal [Guilds of Ravnica] FAB062 put a -1 [Defense] counterSet: Guilds of Ravnica Type: Sorcery Rarity: Mythic Cost: {1}{U}{B} Exile all opponents' graveyards. You may cast spells from among those cards this turn, and you may spend mana as though it were mana of any type to cast those spells. At the beginning of the next end step, if any of those cards remain exiled, return them to their owners' graveyards. Exile Mnemonic Betrayal.