Degare, Merchant of Souls

Shroud
Whenever another nontoken creature dies you may put a Soul Counter on Degare, Merchant of Souls. You may remove any number of Soul Counters from Degare, Merchant of Souls, if you do put that many 1/1 black spirit creature tokens into play under your control.
Creatures you control get +1/+1 and have "Sacrifice this creature, gain 1 life."