At the beginning of combat on your turn, put a -1/-1 counter on up to one target creature. {1}: Until your next turn, Volrath becomes a copy of target creature with a counter on it, except it's 7/5 and it has this ability.

Deathtouch {B}, Reveal this card from your hand: Put a prey counter on target creature. Activate only during your turn. When Tetzimoc enters, destroy each creature your opponents control with a prey counter on it.