Pile the Hoard

Enchant Dragon Creature
When Pile the Hoard Enters the Battlefield
Exile any number of Treasure Tokens becoming
Hoard{x}. Enchanted Dragons gain +{x}/+0
while Attacking and +0/+{x} while Defending.
When Enchanted Creature Dies if you control
a Legendary Dragon you may choose to move
the Hoard to them, otherwise the Opponent who
destroys the Dragon gains the Hoards Treasure.