Tools and instruments can acquire a spirit after being used by a household for 100 years. If they fall into disrepair or are neglected, those spirits can go feral. In the case of musical instruments, there are stories of forgotten ones growing bodies, donning red robes and playing mournfully in the distance.
A monster cat appears, at first, like a regular cat. It grows both larger and size and supernatural powers with age. Some can eventually throw fireballs with their eyes. A cat can become a Bake Neko after 13 years or it grows to 8.25 pounds. This one was inspired by the 1977 Japanese Horror movie, House.
Acrylic paint and embroidery floss on linen with a simple switch and LED lights. 8”
Inspired by the Futakuchi-onna, a woman who rarely eats and grows a monstrous second mouth on the back of her head that isinsatiable. It screams and causes her great pain if it isn't fed. Eventually, her tentacle-like hair grows long enough to feed to the mouth itself. Om nom nom.