Advanced format ruling
Darkbishop Archfiend
Card effect (current official text)The controller of this card pays 500 Life Points during each of his/her Standby Phases (this is not optional). When an Archfiend Monster Card on your side of the field 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 1, 3, or 6, negate the effect and destroy the opponent's card.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.