I will look at the actions. Not sure where that would be assigned. I did find a custom creature mode that has burrowing spiders: https://www.nexusmods.com/fallout4/mods/16241 They used the rad scorpion as a base for that mod though. I will compare using xedit Bloodworms, molerats, rad scorpions, and rad spiders and see if I can see commonalities. Thanks for the help so far! :D