Tragoedia (SDGU-EN016) [Structure Deck: Gates of the Underworld]

You can Special Summon this card from your hand when you take Battle Damage. This card gains 600 ATK and DEF for each card in your hand. Once per turn, you can send 1 monster from your hand to the Graveyard to take control of 1 face-up monster your opponent controls with the same Level as the sent monster. Once per turn, you can select 1 monster in your Graveyard, this card's Level becomes the same as that monster's, until the End Phase.