D&D 5E Boss Fight Help

[Dan Chernozub]

They were patterned after a combination of the Thri-kreen and Doppelganger. The Thri-kreen by itself has a CR of 1, but these Changelings have additional traits that improve their stealth and give them a sort of enhanced Pack Tactics ability. I thought the increase in CR was appropriate.

Leap ability is obsolete for Fly 60 creatures.

HP reduction hits them hard, and doppelganger ability effectiveness depends heavily on you ruling of situations as in OP.

I would suggest that if their whole idea was to saw confusion, I'd _at least_ ask for a Perception roll from the PCs acting immediately.

CR 3 is an absolute overkill on those guys. HP and damage matter most, cool abilities - least. CR1 is their place.