Power has to come from somewhere.

[This is basic magical theory man come on.]

If you're not drawing on your own magicka like a spellcaster does, you need something. Enchantments of the standard type that any petty mage can do use souls stored in soul gems. Increase someone's health or stamina, protect against the elements, enhance skills, that sort of thing.

[Aila is looking at Charlie dubiously again. What rock are you living under, seriously?]