No trigger but try words like:
high contrast

Black and white

Dramatic

Horror

Macabre

Gothic

Ominous

Skeletal

Horns

Dark

Haunting

Ethereal

Eerie

Ghostly

Pale

Tattered

Hooded

Smoke

Moody

Misty

Twisted

Gaunt

Glowing

Elongated

Grotesque

Demonic

Rough

Tendrils

Rough

Tangled