This tutorial teaches you how to achieve the plasma look. This can be applied on anything that requires a form of glowing liquid.
Create a document with a light gray background. Goto FILTER>>RENDER>>DIFFERENCE CLOUDS. Press CTRL+ALT+U and move the saturation bar all the way to the left at -100.
FILTER>>SKETCH>>CHROME and set the detail to 10 and smoothness to 0.
Go to IMAGE>>ADJUSTMENTS>>LEVELS and move the tabs toward the black spikes. Make a new layer and fill it with a color you want the plasma to be. Set the blending mode to "Color" And you\'re done.
Final Result