H.P. Lovecraft was a horror writer who influenced the genre greatly. Instead of traditional villains, he created "horrors," inconceivable beings whose mere aspect defies human logic and can induce madness. "Horrors" have many strange powers and alien mindsets. Although malevolent by human standards, most of Lovecraft's "horrors" are amoral beings that are either insane or too alien for humans to understand; very few of them are desirable to be around, however, and thus are similiar to villains in the sense of being harmful, wicked, and generally antagonistic.
The term "Lovecraftian Horrors" also applies to monsters and demons written in the style of this writer, focusing on psychological horror and otherworldly entities as well as madness-inducing scenarios. Creatures under this category are also known as "Eldritch Abominations."
HIGHLY IMPORTANT: Villains who are merely giant and hideous do NOT fit in this category. Lovecraftian Horrors MUST be, or transform into, something grotesquely hard to describe, disturbing, and logic-defying or AT THE VERY LEAST be written in the style of, or as a tribute to, Lovecraft's work.