Animated, looped auras.

.png, 512x512, 60 frames

You can use Substance Designer / Player to render your own aura from .sbsar file. Auras have several settings where you can change the warp, transparency etc. You will also be able to render at resolutions up to 4096 if 512 is not enough for you. Substance Player is free - you can download it from adobe website (if this program is already installed, but the file does not open - update to a latest version)