Vedos, God of Dreams

As long as you have less than 10
worshippers, Vedos isn't a creature.
When Vedos enter the battlefield or at the
beginning of your upkeep, create X worshippers
where X is your devotion to each color.
Sacrifice X worshippers: You may cast a card
with converted mana cost X or less from your
hand or graveyard without paying its mana cost.