Shaggy, the powerful

Indestructible, shroud
When Shaggy enters the battlefield he deals X
damage to X creatures or players where X is the
number of permanents you control.
If Shaggy were to be killed instead double his
power and toughness.
{w}{w}{w}{w}{w}{w}{w}{w}{w}Monstrosity 10
If Shaggy were to become monstrous he gains vigilance, trample, double Strike, death touch.