The Scrin have apparently gone to work on the husks in the same way the Geth did in the original game. Instead of an electrical blast, they're now armed with energy cannons on their arms, and their hands are four foot long blades.
The Battlemind. Unrelenting, and nearly unstoppable (to the point where an entire belt clip of sonic grenades - the Scrin's Kryptonite - detonating on top of it merely stuns it) and armed with a weapon that lets it tear apart walls and vehicles and infantry squads with casual ease. And on top of that? It has a sense of humor.
The Scrin cruiser that defeated the turian cruiser Valadictum. It effectively tanked everything the turian ship threw at it while firing back tiberium-tipped directional flak shells loaded with nuclear explosives. And then it casually outmanuevered the Valedictum, disabled it, and instantly took control of the entire crew with Masterminds.
When Kane showed up at the end of chapter five, the fanbase was roaring their approval, anticipating that the Tiberian Saga's favorite Chessmaster, Dark Messiah, and all around Magnificent Bastard would start playing everyone like a piano. And then, in the very next chapter, after doing just that to the entire Citadel Council chamber, with Shepard tailing him after he makes a discreet exit. In the ensuing conversation, Kane says three little words that made the fanbase's collective hearts stop beating: "I don't know."