Advanced 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.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.