Tengu format ruling
Sinister Seeds
Card effect (current official text)When a monster you control is destroyed by a battle in which you took damage, and it was in face-up Attack Position at the start of the Damage Step and when it was destroyed: Special Summon 1 "Sinister Seed Token" (Plant-Type/DARK/Level 1/ATK 100/DEF 100) for every 500 points of battle damage you took from that battle.
Rulings
- Sinister Seeds can be activated when the monster destroyed by battle is sent to the GY.
- You cannot activate Sinister Seeds if you do not receive at least 500 points of Battle Damage.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.