Necromantic Conduit

Whenever a nontoken creature dies put a Soul counter onto this artifact
{p/b}{t} Remove 1 soul counter: summon a 1/1 spirit with flying
{p/b}{t} Remove 2 soul counters: summon a 2/2 zombie
{p/b}{t} Remove 5 soul counters: return target creature from your graveyard to your hand.