Opal Acrolith [Urza's Saga] Common when a "Battlin' Boxer" monster

when a "Battlin' Boxer" monster you control is attacking or being attacked: You can banish this card from your hand or Graveyard

Knowledge fills the mind of a fool and opens the mind of the sage

Set: Eternal Duelist Soul Card type: Normal Trap Rarity: Secret Rare Roll 1 six-sided die

Set: Rivals of Ixalan Type: Instant Rarity: Rare Cost: {2}{U} Exile target nonland permanent

Opal Acrolith [Urza's Saga] Common when a "Battlin' Boxer" monsterSet: Urza's Saga Type: Enchantment Rarity: Uncommon Cost: {2}{W} Whenever an opponent casts a creature spell, if Opal Acrolith is an enchantment, Opal Acrolith becomes a 2 4 Soldier creature. {0}: Opal Acrolith becomes an enchantment.