Video showing how to make skulls. When finished, paint with glow paint and you have inexpensive glowing skulls. If placing on a wall, you probably don't need the back of the skull and if careful, can get 2 skulls per jug.
Pencil sketch monster, might be nice to contrast with bright typography? PK_M Collection by Paride Bertolin, via Behance Value unit : A monster a day until halloween each monster using a different value tech.