Deity Lance, CHAOS X Tempest Buster! (X-CBT-B/0021EN) (X-CBT)

You may only cast this card if your opponent has 5 life or less and no monsters on the center, and your cards attacked four times or more during this turn. (Link attacks count as one attack.)
[Cast Cost] [Pay 3 gauge]
Deal 5 damage to your opponent!! 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)