REDU format ruling
Battle Teleportation

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Activate if you control only 1 face-up Psychic-Type monster, and select that monster. It can attack your opponent directly this turn. At the end of the Battle Phase, give control of that monster to your opponent.
Rulings
- This effect targets your face-up Psychic-Type monster.
- You can activate "Battle Teleportation" even if your opponent has no open Monster Card Zones. If you do, the Psychic-Type monster is unable to move to your opponent’s side of the field and is destroyed.
- You cannot activate "Battle Teleportation" if you cannot enter your Battle Phase.
- You can activate "Battle Teleportation" if your opponent has "Swords of Revealing Light" face-up on the field because "Swords of Revealing Light" only prevents you from declaring an attack.
- This card can target a monster that has already attacked.
- You can activate "Battle Teleportation" any time between your Draw Phase and the end of the Battle Phase.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.