REDU format ruling
Exodia the Forbidden One

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)If you have "Right Leg of the Forbidden One", "Left Leg of the Forbidden One", "Right Arm of the Forbidden One" and "Left Arm of the Forbidden One" in addition to this card in your hand, you win the Duel.
Rulings
- This isn't an effect; it's a condition. It just happens as soon as you have all 5 pieces in hand.
- The victory "check" happens in between chain links, but not while resolving effects. EG: If you draw the last piece with "Graveful Charity", you must discard first. EG: If you activate 2 "Reckless Greed", and draw the last piece with the 1st, you win before the 2nd resolves.
- If both players draw all 5 pieces at the same time, everbody wins! It's a draw.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.