Tengu format ruling
Gemini Booster
Card effect (current official text)Equip this card to a Gemini monster you control as an Equip Card. It gains 700 ATK. When this card is destroyed while equipped and sent to the Graveyard, select 1 face-up Gemini monster and treat it as an Effect Monster.
Rulings
- Both effects of this card target 1 face-up Gemini monster you control.
- The effect to treat a Gemini monster as an Effect Monster activates even if all Gemini monsters you control are being treated as Effect Monsters.
- The effect to treat a Gemini monster as an Effect Monster activates even if "Gemini Booster" is destroyed because the monster it was equipped to is destroyed by battle.
- You can activate "Gemini Booster" during the Damage Step.
- The effect to treat a Gemini monster as an Effect Monster starts a Chain.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.