Tengu format ruling
Wave-Motion Cannon
Card effect (current official text)During your Main Phase: You can send this face-up card to the GY; inflict 1000 damage to your opponent for each of your Standby Phases that have passed since this card was activated.
Rulings
(1) During your Main Phase, you can send this card to the GY to inflict 1000 damage to your opponent for each of your Standby Phases that have passed since this card was activated.
- The (1) Ignition-like Effect activates & resolves on the field.
- Sending Wave-Motion Cannon to the GY is a cost.
- No Counters are involved in this card's effect. You simply count your own Standby Phase.
- This effect cannot be negated by Magic Jammer, etc. Your opponent can chain Magic Jammer when you first activate Wave-Motion Cannon (when you place it face-up on the field).
- If Imperial Order is active, count Standby Phases as normal for Wave-Motion Cannon.
- You can activate Wave-Motion Cannon (place it face-up on the field) and send it to the GY during the same turn, but it will not do any damage.
- If Solomon's Lawbook skips your Standby Phase, or the turn is skipped with Gamble, increase the count for Wave-Motion Cannon anyway. Pyro Clock of Destiny will not increase the count.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.