Spellborn Serpent

Whenever you cast an instant or sorcery spell, if
it was cast from your hand, put a +1/+1 counter
on Spellborn Serpent.
At the beginning of your upkeep, remove a
+1/+1 counter from Spellborn Serpent.
Whenever Spellborn Serpent deals combat
damage to a player, you may cast an instant or
sorcery spell with X in its casting cost from your graveyard. If you do X is equal to Spellborn Serpent' power.