Scrap-Iron Signal (LDS3-EN124)

When your opponent activates a monster effect, while you control a Synchro Monster that mentions a Synchro Monster as material: Negate the activation, also, after that, Set this card face-down instead of sending it to the GY. You can only activate 1 "Scrap-Iron Signal" per turn.

trap / Counter, Legendary Duelists: Season 3