Terramity adds a liquid called Stygian Blood that is supposed to generate in the nether. While Northstar is installed, Stygian Blood does not generate and evaporates when placed in the nether.

https://www.curseforge.com/minecraft/mc-mods/terramity/files/5864302
https://www.curseforge.com/minecraft/mc-mods/create-northstar/files/5611707