Shadowknight Archfiend
The controller of this card pays 900 Life Points during each of his/her Standby Phases (this is not optional). When this card is targeted by the effect of a card controlled by your opponent, when resolving the effect, roll a six-sided die. If the result is 3, negate the effect and destroy the opponent's card. The Battle Damage this card inflicts to your opponent is halved.