Direct Dynamic Diamond Overhead!!

You may only cast this card during your opponent's final phase if you did not take damage during this turn, and you have a 《Prism Dragon》 on your center.

[Cast Cost] [Pay 4 Cards]

[Counter] Deal damage to your opponent equal to 200K plus the number of times your opponent's cards attacked during this turn!! This card cannot be nullified, and its damage cannot be reduced. If your opponent's life would become 0 by this card, it cannot be changed by your opponent's cards. (Unrevivable)