Tengu format ruling
Tri-Blaze Accelerator
Card effect (current official text)Activate only by sending 1 face-up "Blaze Accelerator" on your side of the field to the Graveyard. You can send 1 Pyro-Type monster from your hand to the Graveyard to destroy 1 monster your opponent controls and inflict 500 damage to your opponent, but you cannot declare an attack during this turn if you do.
Rulings
- Sending 1 face-up "Blaze Accelerator" on your side of the field to the GY is a cost to activate this card.
- Sending 1 Pyro-Type monster with 500 or less ATK to the GY is part of this card’s effect. It is not a cost.
- You cannot activate the effect of this card in the same Chain as this card’s activation. You can only activate the effect after this card’s activation is resolved, and it is face-up on the field.
- If you activate this card's effect then you, the player, cannot declare an attack so even a monster unaffected by the effects of Spell Cards like Horus the Black Flame Dragon LV6 cannot attack.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.