REDU format ruling
Zombie Tiger
Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Once per turn, you can either: Target 1 "Decayed Commander" you control; equip this card to that target, OR: Unequip this card and Special Summon it in Attack Position. While equipped by this effect, the equipped monster gains 500 ATK/DEF. If the equipped monster destroys an opponent's monster by battle: Discard 1 random card from their hand. (A monster can only be equipped with 1 Union monster at a time. If the equipped monster would be destroyed by battle, destroy this card instead.)
Rulings
(1) Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your Decayed Commander as an Equip Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. (2) While equipped to a monster by this card's effect, increase the ATK/DEF of the equipped monster by 500 points, and each time it destroys 1 of your opponent's monsters, your opponent discards 1 card randomly from his/her hand. (C) (1 monster can only be equipped with 1 Union Monster at a time. If the equipped monster is destroyed as a result of battle, destroy this card instead.)
- When a monster equipped with Zombie Tiger destroys another monster, the discard effect is applied before the destroyed monster is sent to the GY.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.