REDU format ruling
Oilman
Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Once per turn, you can either: Target 1 Machine-Type monster you control; equip this card to that target, OR: Unequip this card and Special Summon it in Attack Position. While equipped by this effect, if the equipped monster destroys an opponent's monster by battle: Draw 1 card. (A monster can only be equipped with 1 Union monster at a time. If the equipped monster would be destroyed, destroy this card instead.)
Rulings
(1) Once per turn, during your Main Phase, you can equip this card to a Machine-Type monster you control as an Equip Card, OR unequip it to Special Summon this card in face-up Attack Position. (2) While equipped to a monster by this effect, if the equipped monster destroys an opponent's monster by battle, draw 1 card. (C) (A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed, destroy this card instead.)
- The effect to draw a card while "Oilman" is equipped starts a Chain.
- Equipping "Oilman" is an Ignition Effect, and the effects while equipped are considered as effects of a Spell Card.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.