The Black Tarantula

Lifelink

Whenever Black Tarantula deals combat damage to a player, Black Tarantula deals 2 damage to target creature. If that creature dies this turn, you gain 2 life.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
The mask never dies.