Today I released a custom script on Curseforge that lets any obsidian skull to be used in the Obsidian Shield and Obsidian Water Walking Boots recipes. I would like to have you use it in this modpack once my script gets approved. Here is a link (It might not let you see it until it gets approved): https://www.curseforge.com/minecraft/customization/obsidian-skull-tweaks

try post that in discord, i would like this issue tracker to be only for issues