How to quickly reduce the magicka costs of Alteration spells

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So I found a Spell Tome book: "Telekinesis", in a dungeon and I think it is a Adept or Expert level spell and it takes around 189 Magicka per second. I can only use that spell for like 7/10's of a second with my Magicka completely full on the account with the most Magicka (around 220 or something).

How do I get it so that I can use Telekenesis for at least 15 seconds? Although I have thought of getting the Adept or Expert perk for Alteration that makes it cost half as much Magicka, I think it would still not take long at all to completely run out of Magicka. Also, I have thought of finding an Alteration trainer, but I can not seem to find one.

Best Answer

One of the most effective ways to reduce your magicka costs is by wearing armour with the Fortify Alteration enchantment. Multiple pieces stack- you can wear armor, a ring, an amulet and a helmet with the enchantment on it. With a high enough enchanting you can get -25% on each and cast that school for free.