- They can be aquired by using certain Unique Items - works on-color and off-color.
- They can be bought directly at Exotic Mageware - works on-color and off-color
- They can be learned from researching ancient spell scrolls - Works full researched on-color 100%, may fail in other cases - if failed, zeroes your m.p..
Using an off-color ancient spell is only possible at very high spell level (and with help of Concentration by a God). - It is also color dependent.
As a white i tried casting Corruption with God's Concentration and here is what i got.
You start to concentrate on the spell Corruption. Your God forbids you using this cursed spell! You finished casting the spell Corruption on yourself.
Note: Mana & Turns were still deducted. - GoeGoe