Just because I've seen some confusion over it today, I want to address it:
This is a Lictor (see pictures below). It's a Tyranid bioform that specializes in infiltration, scouting, and assassination. Also, it'll crack open your skull and "suck out the secrets held within using their feeder tendrils."
Under the current rules it has Infiltrate, Lone Operative, and Stealth, allowing it to deploy well into the mid-board and stay hidden. great for completing objectives. It also has the Precision keyword on it's melee attacks, allowing it to more easily take out character units.
It is closely related to the Neurolictor, Deathleaper, and Von Ryan's Leapers (named after the man who discovered them, although they got the JUMP on him🤣) and even shares some of the same keywords (Great Devourer, Vanguard Invader). It is worth noting that all these units are all the subject of the current 1-point "Ambush Predators" detachment, which is a rather fitting description.