Tengu format ruling
Fox Fire
Card effect (current official text)During the End Phase, if this card was destroyed by battle and sent to the Graveyard this turn and was face-up at the start of the Damage Step: Special Summon this card from the Graveyard. This face-up card cannot be Tributed for a Tribute Summon.
Rulings
- In order to activate its effect, Fox Fire must be face-up when the attack that destroyed it was declared (like Atomic Firefly). If a face-down Fox Fire is attacked, its effect is not applied even though it is face-up when destroyed.
- While Skill Drain is active, you can Tribute Fox Fire for a Tribute Summon.
- If the opponent controls your face-up Fox Fire, and it is destroyed as a result of battle, it will be Special Summoned to your (the owner’s) side of the field during the End Phase.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.