Tengu format ruling
Sinister Sprocket
Card effect (current official text)If this card is sent to the Graveyard for the Synchro Summon of a DARK Synchro Monster, you can destroy 1 face-up Spell or Trap Card.
Rulings
- When Sinister Sprocket is used as a Synchro Material Monster, if the Synchro Monster becomes a DARK monster when it is Synchro Summoned (due to DNA Transplant, etc.), you can activate Sinister Sprocket's effect.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.