Chem, Unbound

Spirits you control gain +3/+0
When Chem, Unbound enters the battlefield sacrifice all spirits you control.
Chem, Unbound enters the battlefield with X
+1/+1 counters on it where X is the number of Spirits sacrificed this way
{3}{b}{b}{t}: Remove a +1/+1 counter from
Chem, place target creature in your graveyard
onto the battlefield as a white and black spirit
with flying, it loses all other colors and abilities