Even with Arcanum downloaded you’ll still need to put in quite a lot of work to acquire the more than 100 new spells the mod introduces. This isn’t one of those mods where you simply install it and open your inventory to find a whole bunch of new spell tomes ready to be used. Thanks to Arcanum you’ll finally become a truly powerful spellcaster.
With this mod installed you’ll be summoning pillars of energy and tornadoes from the heavens, flinging tremendous and explosive fiery orbs and deadly electrical lances, and even pulling meteors down from outer space and smashing them down onto your hapless enemies.