REDU format ruling
Darkbishop Archfiend

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
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.
Rulings
- When you have another Archfiend that can roll a die and Darkbishop Archfiend, and the other Archfiend is targeted, you get to roll both dice, and you can choose which one to roll first.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.