Is the topic still horror?!
Sorry I'm a late/new comer... Hi guys! Welcome me (kidding)!
Anyway... this is what I had in mind when I was given this topic.
A combination of things I deem horrifying...
1) Legion from Castlevania - the most disturbing concept on earth. I hate this boss. I'm honestly disturbed every time I see it, its disturbance is equivalent to cockroaches.
2) Pregnant monster...
3) Going bald