The Doom Slayer

Haste, Trample
Whenever The Doom Slayer enters the battlefied
or attacks, sacrifice a creature.
Whenever you sacrifice one of the following creatures, Doom Slayer gains the following effect:
Demon - put two +1/+1 counters on The Doom Slayer
Devil - This card gains indestructible until
end of turn.
Imp - gain 3 life, target opponent loses 3 life.