For example, some of those pointy bits of metal are on fire.
Each group of enemies is affected by the magical focus of its leaders. Kabal’s followers like fire, iron, golems, and all of that fun stuff. Nostura enjoys magical beasts and the Fey. Last but not least, Gyrion has plenty of minions tied to the Spellplague and thus features mutated monstrosities that can best be described as “very blue.” There are also Nashers running around, just to ensure that Neverwinter (the game, once again) players don’t wind up running out of enemies to beat up even before assaulting the three high-level adversaries leading these groups.