Archfiend Game - Shadowknight

(This card's name is always treated as "Shadowknight Archfiend".)
Cannot be Normal Summoned, unless you control another "Archfiend" monster. During each of your Standby Phases, pay 500 LP or destroy this card. If this card is targeted by a card effect: Roll a six-sided die, and if the result is 2 through 5, negate that effect, and if you do, banish 1 card from your opponent's GY, otherwise this card loses 500 ATK and 400 DEF.