Deity Lance CHAOS X Tempest Buster! (R)

You may only cast this card if your opponent's life is 5 or less, your cards have attacked four times or more during this turn, and your opponent does not have a monster in the center. [Cast Cost] [Pay 3 gauge] Deal 5 damage to your opponent! This card cannot be nullified and the 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)