Fynn, the Fangbearer (Serial Numbered) Foil (MUL-156) - Multiverse Legends: (Showcase)

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Whenever a creature you control with deathtouch deals combat damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)