Tragoedia (SDGU-EN016)

When you take battle damage: You can Special Summon this card from your hand. Gains 600 ATK/DEF for each card in your hand. Once per turn: You can send 1 monster from your hand to the GY, then target 1 face-up monster your opponent controls with the same Level the sent monster had in the hand; take control of that face-up monster. Once per turn: You can target 1 monster in your GY; this card's Level becomes the same as that target's, until the end of this turn.

Fiend / Effect, Gates of the Underworld Structure Deck