Gwyn, Lord of Cinder

+2: You may summon a knight creature card from your hand without paying its mana cost. Add a Cinder counter to this card.
0: Gwyn Lord of Cinder becomes a X/X Knight Lord creature with haste until end of turn where X is equal to the number of Cinder counters on him.
-X: You may cast any spell with converted mana cost of X as an instant This ability may be used at any time.