Sablelock, because that name helps you understand it instantly!
Welcome back. the current bdif for disruption is definately the much mentioned Sablelock. It uses Sableye SF, Garchomp C Sv and it's Lv.X, Judge UL (supporter) and Cyrus' Iniative SV (supporter) to get out and amaintain dominance of the opponenet's hand and field. You also utilize Giritina PL with the Let Loose Poke-power, Unown UD, Crobat G PL and other Pokemon SP like Honckrow or Toxicroak G Promo so that you can utilize the Cyrus Conspiracy card (modernday Castaway) engine and Power SPray (Pokemon's Trap Card). Chatot G SV is also common, being able to control what your opponent draws into.
I'm sure you can find a half decent list somewhere ont he gym, but the basic idea is Sableye grabs whichever of the supporters you need (main 4 are Pokemon Collector and Cyrus/Cyrus/Judge) to set up quickly while disruptting the opponent. In the rotation, Judge cripples most decks, while you can keep using Sableye's Impersonate to set yourself up, while using Garchomp SV Lv.X to keep in check your opponent's Pokemon on the field, and everything else at your disposal to prevent your opponent from getting out their decks attackers. Uxie LA is the decks draw engine (pretty much the only one we have left) and I'd recomend a 1-1 Drifblim UD line, who takes care of problems the deck otherwise ahs with big HP tanks, Machamp SF and Mewtwo Lv.X