Wattsper

The Wattsper is an intangible spirit, similar to it's kin the Wisper both capable of passing through solid blocks. The Wattsper seems to be surrounded by a field of electricity, this dissipates and becomes concentrated into bolts of lightning when spotting prey. When attacking, they swell up and float in different directions or strait at you after they fire. They shoot lightning bolts that "burn" on the ground for about 6 seconds. Getting hit by the "fire" gives you the Electrified status while the bolts and the body of the wattsper give Light and Levitation.

Wattsper are based off of Will-o'-wisps.

. Wattsper is a unique monster found on any kind of Proto-Worlds. and also in ______ mini-biomes. It is capturable.

Luna's Lab Notes
~ Can be useful as a pet as it's ability to phase through walls and illuminate an area with it's body and bolts of lasting electricity.

Source: 

https://github.com/sayterdarkwynd/FrackinUniverse/blob/master/monsters/ghosts/wisperish/wattsper/wattsper.monstertype