Tragic Twin Twined Jewels DOOD (Common)

Equip only to a monster you control that was Special Summoned from the Extra Deck. If your opponent Special Summons a monster(s) from the Extra Deck with ATK higher than the equipped monster (except during the Damage Step): You can target 1 of them; destroy the targeted monster, destroy the equipped monster, and if you destroyed at least one of them, you take damage equal to their combined original ATK. Then, inflict damage to your opponent equal to the damage you took.