Arterial Apprentice

During combat, Arterial Apprentice has protection from nonartifact creatures.
Artifact creatures blocking and blocked by Arterial Apprentice have deathtouch.
Whenever a nonartifact creature dies, put a +1/+1 counter on Arterial Apprentice and it gains lifelink until end of turn.
{t}, Sacrifice Arterial Apprentice: You gain 2 life.