User blog comment:アゼム/【For any users】Guessing (buddy)game of the year (2014)!/@comment-6053530-20140506091423

[Cast Cost] Pay 3 gauge. When your opponent's monster deals three or more damage to you, if the attack is not a link attack and this card is in the soul of "Secret Sword, Lethal Formation", you may cast it. (You may not cast it from your hand.) [Counter] Deal 3 damage to your opponent! Nullify the damage dealt by your opponent.

Rarity: RRR! (ﾉ≧∀≦)ﾉ

This ability may seem very broken (it might as well be), but if your opponent doesn't play critical 3 monsters, it becomes a dead card in the deck.