Gwyn, Lord of Flame

If Gwyn, Lord of Flame would enter the
battlefield and it wasn't cast or no mana was
spent to cast it, exile it instead.
Vigilance, trample, lifelink
When Gwyn, Lord of Flame leaves the
battlefield, exile the top ten cards of your library.
You may cast any number of spells with total
mana value 10 or less from among them without
paying their mana costs.