...I would expect to see manticores and chimeras in there. I mean if you fuse the heads on a chimera you'd get enough intelligence to rival celestia with enough conflict and disorder to magically result in pure chaos. Mind you this is all conjecture and in point of fact, In a magical world, it is the being that defines the form such that as time passes the inhabitants of the world behave less and less like their creators and more an more like denizens of an active world. Thus, The chimera, the manticore are likely discord's children. To that end, their dame would be the mother of something such as the hydra. Perhaps not his own progeny but related to them. As the centuries pass depending on the ebb and flow of magic, the beasts may fade to lesser creatures or even entirely. Can the world sustain them? Can they sustain themselves? Is fate yet to introduce new players or is instead the game set and on its proper course? Only the lonely eons may tell.