Shadowknight Archfiend (SGX3-ENE06) - Speed Duel GX: Duelists of Shadows 1st Edition

The controller of this card pays 900 Life Points during each of his/her Standby Phase (this is not optional). When this card is specifically designated as a target of 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''s Life Points is halved.