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.
You can activate Tetzimoc's activated ability more than once during your turn.
19 Jan 2018
Tetzimoc's triggered ability doesn't care how a prey counter got onto a creature an opponent controls or whose Tetzimoc put that counter on the creature. Tetzimoc is happy to eat all the opponent's prey it can see.