Hello, not sure where to ask this question since the Discord invite is down, so figured I would ask here.

Since this mod's assets are licensed under All Rights Reserved, I would like permission to alter the pre-existing assets for a personal modpack that I will release via Curseforge. Neither the pack itself or its custom assets will be sold.

You mean like a resource pack?

https://discord.gg/mjqEYAp2Nq

Basically yes.