When casting a spell with the tome of blood, while not having enough Ars-mana, results in the message "not enough mana" and no spell being cast.
Found out by casting some spells with the ars book, switching to the tome, and trying to cast a spell with that.

Yikes! This one was fixed a while ago, closing it out now.

What a neat issue, I'll look into it! Shouldn't be too bad to fix. I might have run into it last night testing a new feature