[Question]

They are undead, you can just reattach an arm or something. If you have the magic to raise the dead from the ground, you can surely do that.

Also noticed something weird with the erinyes...one of them attacked a researcher, who casted hellbind heart. The erinyes failed the save, so the battle ended in a victory for me. The erinyes didnt join my army though, and just kept attacking from next turn onwards. Not sure if intended.