Crash Report
https://pastebin.com/M9FTq4mp

Can be fixed by disabling Hydra using other mods.
The report says "Couldn't find registry entry for iceandfire:dreadqueen"
when the registry name of Dread Queen is iceandfire:dread_queen so maybe that's what is causing the crash for some reason.

The same crash happens for gorgon and cockatrice as well. The report still says "Couldn't find registry entry for iceandfire:dreadqueen"