Vatarath, Prime Malitiae

Indestructible
At the beginning of combat on your turn, any opponent may pay 7 life. If no one does, gain
control of target creature until end of turn.
Untap that creature. It gains your choice of
deathtouch, haste, or menace until end of
turn. Vatarath, Prime Malitiae deals 7
damage to target player or planeswalker.
That player or that planeswalker's controller
discards seven cards, then sacrifices seven
permanents.