Could not find an existing duplicate question, but this may be due to not know how to describe the word/feeling!
For example, given the following sentence:
Francis could not look away from the blood-drenched vampire. The blood-soaked clothes and shimmering fangs were X
And X is specifically drawing upon the fact that the appearance is horrifying, horrible, scary, etc.
Similar words that come to mind but are generic in their motivation: hypnotic, transfixing
First question on this Stack so apologies if poor formatting!