Arvyn10

Skeletal Dragon in Labyrinthian and Vulthuryol in Blackreach are not bad examples to build on. Here's what I picked up by a quick look at CK: Skeletal Dragon's "no-flying" limitation is made possible by adding a spell/active effect to its Spell List of Actor window. The spell's Editor ID is AbNoFlightMG07Dragon, which functions akin to "passive" Dragonrend Shout. Vulthuryol is affected by a different spell, named AbNoFlight as Editor ID. With the exception of the spell being assigned to a Package, and NOT actor. I've yet to dig much into Papyrus scripting, but perhaps one could make a script that is put directly to the base dragon (Actor) to add the spell AbNoFlightMG07dragon or AbNoFlight to said dragon whenever it enters combat state.