Root of Power is an All-Maker stone power in The Elder Scrolls V: Dragonborn.
Location[]
It can be acquired from the Tree Stone after completing the quest "At the Summit of Apocrypha." Like all powers from the All-Maker stones, it can only be used once. To use it again, it must be reacquired from the stone.
Effect[]
Spells temporarily cost 75% less magicka.