Thicket Spiritualist

{t}: Add {b} or {g}. Spend this mana only to cast creature spells from your graveyard.
Spirit creatures you control get +1/+1.
When Thicket Spiritualist enters the battlefield, create a number of 0/0 black Spirit creature tokens with deathtouch equal to the number of creature cards in your graveyard.
"Souls should be free."