Necrogen Rotpriest (Borderless Ichor Step-and-Compleat Foil) [Phyrexia: All Will Be One]

Toxic 2 (Players dealt combat damage by this creature also get two poison counters.)

Whenever a creature you control with toxic deals combat damage to a player, that player gets an additional poison counter.

1BG: Target creature you control with toxic gains deathtouch until end of turn.