Plasma blast seen from the side. I layered two cylinders on top of one another and scaled them while eroding them with a noise texture to create the stringy bits of plasma.

Plasma ball buildup. The ball is distorted by the shader through manipulating its World Position with the use of a panning world aligned noise texture.

The arcs of lightning are straight lines that gets distorted by panning noises across its UVs.

The dome of doom, my main inspiration for this effect, cuts away just as it starts eroding, so we never know what the full erosion looks like. I kept the "holes" from the movies by subtracting a Voronoi noise pattern, and distorted it as it goes along.