Pronouns replace nouns or noun phrases. Some examples of pronouns are:
* I, me, my, mine
* You, your, yours
* He, him, his
* She, her, hers
* It, its
* We, us, our, ours
* They, them, their, theirs
If you're looking for a way to refer to the action of enchanting, you could use a noun like:
* Enchantment
* Spell
* Charm
* Magic
For example:
* The enchantment was powerful.
* The spell protected the castle.
* The charm made her irresistible.
* The magic was ancient and mysterious.