Loop of Destruction - LC06-EN005 (UR) (Yugioh)
Continuous Trap
This card's name becomes "Ring of Destruction" while on the field. Once per turn, if a monster(s) on the field is destroyed by a card effect (except during the Damage Step): You can target 1 monster on the field; destroy it, and if you do, each player takes 500 damage.
Attack: -
Defense: -
Attribute: TRAP