Tengu format ruling
Ido the Supreme Magical Force
Card effect (current official text)You cannot Summon monsters. You can only control 1 "Ido the Supreme Magical Force". If this card is destroyed by a card effect and sent to the Graveyard, Special Summon it from your Graveyard during the next turn's Standby Phase and destroy all other monsters you control.
Rulings
- The effect of "Ido the Supreme Magical Force" that Summons it in the Standby Phase, and its effect that destroys all other monsters, happen simultaneously. Therefore, you can activate "Torrential Tribute" or "Bottomless Trap Hole" when it Summons itself, as you have not missed the timing.
- If your next turn’s Standby Phase is skipped, you cannot Special Summon "Ido the Supreme Magical Force" with its effect during the following Standby Phase. The opportunity has been missed.
- If "Ido the Supreme Magical Force" is not in the GY during the next Standby Phase (if it has been removed from play, for example), it is not Special Summoned, and you do not destroy any monsters with its effect.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.