I've seen some Abyssal fleet avatars with crazy effects, but idk where to find them. they are available as vrca files, but without animations, they are useless
https://ripper.store/detail?id=Fp1ypoAhohs68AJSoi
https://ripper.store/detail?id=8gKOoXGv1L1sYnnqYB
https://ripper.store/detail?id=cwFqTceemAeAMrsj72
https://ripper.store/detail?id=txfN6DykKEWaFjQobV