REDU format ruling
Taunt

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Activate only during your opponent's Main Phase 1; select 1 monster on your side of the field. While the selected card remains on the field, if your opponent attacks with a monster(s) this turn, they must select the selected monster as the attack target.
Rulings
- If a monster selected by Taunt is moved to the turn player’s side of the field, the turn player can conduct attacks normally without worrying about the effect of Taunt, because without a card effect that allows it, a player cannot attack monsters on his own side of the field.
- If multiple monsters are selected by multiple Taunts, the turn player selects 1 of the monsters selected by Taunt and can attack it.
- If 1 monster is selected by Taunt and another is equipped with Ring of Magnetism, the turn player must attack the monster equipped with Ring of Magnetism if he attacks.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.