In the last playthrough my souvreign managed to get his tactical spells to cost no mana.
He had the following abilities and gear at that time
Path of the Mage
Affinitie
Magic Robes
and had the Mantle of Oceans enchant
not sure if this is supposed to happen.
example casting drain life
Casting
After the cast, notice mana has stayed the same
Free Fireballs are fun
