Slaynn, Ghost of the Past

Double Strike, haste, shroud, lifelink
{t}: Endless Servitude - If a creature has been
put into a graveyard this turn, gain 3 life for each creature that has been dealt damage
this turn.
Sometimes, the past bites far, far harder than the present or future ever will. Especially if that past remembers itself.
-Ojutai, mountaintop seer