REDU format ruling
Magical Merchant

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)FLIP: Excavate cards from the top of your Deck until you excavate a Spell/Trap, then add that card to your hand, also send the remaining cards to the GY.
Rulings
- You need to show the cards to your opponent, including the one you keep.
- If you pick up your entire Deck and there were no Spell or Trap Cards, then Magical Merchant's effect disappears.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.