Kozilek, The Bane of Worlds

Menace Annihilator 2
When Kozilek, The Bane of Worlds enters the battlefield, Draw 7 cards.
When an opponent casts a colored spell,
Kozilek, The Bane of Worlds deals X damage to
target opponent,
which X is the casting cost, if X is higher than 5,
the damage cannot be prevented.
When others saw beauty, He saw destruction