Drakon the World Burner

Flying Trample Haste Indestructible Hexproof
When this creature enters or leaves the battlefield
it deals X damage to all creatures that you do not
control and all opponents where X is the mana
spent to cast this spell in total this game
{x}{t} This creature deals X damage to all
creatures that you do not control
{x}{t} This creature deals X damage to all
opponents
{p/r} Return this creature to your hand