Demon of Fate's Design (Extended Art) (CMM-762) - Commander Masters: (Extended Art, enchantment)

Flying, trample
Once during each of your turns, you may cast an enchantment spell by paying life equal to its mana value rather than paying its mana cost.
{2}, Sacrifice another enchantment: This creature gets +X/+0 until end of turn, where X is the sacrificed enchantment's mana value.