Big Dog, Beast of Chaos

When Big Dog, Beast of Chaos enters the battlefield
deal 2 damage to a random enemy X times, where
X is equal to the amount of {r}and {w}mana spent
to cast Big Dog, Beast of Chaos.

{t}, {x}: Target X other Creatures on the battlefield.
These Creatures attack random permanents
till they die. Creatures with 0 power will still attack
and take damage.