Ring of Destruction [PGD-000] Secret Rare GAOV-EN041 Her diligence in pursuing both

Her diligence in pursuing both is her greatest asset

Set: Commander 2015 Type: Artifact Rarity: Mythic Cost: {5} Creatures you control get +1/+1 and have flying and indestructible

destroy target nonblack creature that player controls

Set: Signature Spellbook: Jace Type: Instant Rarity: Rare Cost: {U} Search your library for an instant or sorcery card and reveal that card

the ATK/DEF of those changed monsters become 0

Ring of Destruction [PGD-000] Secret Rare GAOV-EN041 Her diligence in pursuing bothSet: Pharaonic Guardian Card type: Trap Card Rarity: Secret Rare During your opponents turn: Target 1 face up monster your opponent controls whose ATK is less than or equal to their LP; destroy that face up monster, and if you do, take damage equal to its original ATK, then inflict damage to your opponent, equal to the damage you took. You can only activate 1 Ring of Destruction per turn.