Is Syncopate legal in Standard, Modern, and Commander?

Syncopate is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Syncopate?

Syncopate is an Instant. Its oracle text reads: "Counter target spell unless its controller pays {X}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. *"Your eyes, they burn with resolve . . . beautiful."*"