Forge version:
Twilight Forest version:
Link to crash log: https://pastebin.com/srrqDLk7
Steps to reproduce:

1. spawn ur-ghast

What I expected to happen:

What happened instead:

1. next time, please use a proper issue template. We have them for a reason.
2. This is an issue with Sponge. It doesn't like our large entities, luckily this is easily fixable. Open config/sponge/global.conf and set the max-bounding-box-size to 6000 or higher, or 0