Am I the only one that found the spider eggs? thy do have a mechanic in game to summon a small group of low hp animals at once in game. so i hope it extends to spells.
I found them, but never used them for anything. I was waiting for a challenge that was overwhelming enough that I had to resort to kitchen sink tactics. I don't use consumables as a general rule, I either hoard them if they are unique or sell them if they are common. They are the backbone of my income stream because they are usually light weight and valuable