Weird, strange, and horrific creatures created by the Imbrians during their mad tenure.

The War of the Teratomorphs wasn't a military campaign, but rather it was a highly tumultuous period of human history where rampant arcanotech was misused and unleashed a storm of teratomorphs on the world. The creatures fought each other as much as they preyed on humanity. 

Where came the sickness, the shaman knew not. No herb, no smoke, no spirit dance could carry it away. What curse of heaven carried the plague, the sages and priests could not say. The gods struck, and no prayer, no elixir could save their victims. How the malaise spread, no doctor could know. With not even a body to spread the miasma, surely it must be a curse. And when at last, the right lenses were turned upon the pus of the suffering.  

30 patrons to encounter in the Library of Celaeno

A relentless and unearthly durable type of dimensional fatigue 'denizen'

Also known as demons, mutants, and monsters, Youma were once human beings.

Strange creatures, half dreamed half imagined, figments of delerium, wisps of insanity.

7 things that make a work of fiction Lovecraftian, even if it doesn't deal at all with the established Mythos