There's a new Unearthed Arcana from WotC today, hot on the heels of the recent one for barbarian and monk. "Two classes, the sorcerer and the warlock, discover new playtest possibilities this week. The sorcerer receives a new Sorcerous Origin feature: the Aberrant Mind. Meanwhile, the warlock gains a new Otherworldly Patron feature: the Lurker in the Deep. We’ve also included a new cantrip: mind sliver."