in this world of swords and magic, many people rely on an outer source to power their magic. weather they would be religious deities or mortal creatures such as animals. Though it is possible to use just strictly mana, having a pact with another creature provides a very large advantage in fights, and just generally with or without magic.

rarely though legendary creatures, and of course, gods can be used and are used by the strongest of sorcerer and brawlers, and including this group magic sources is you. but it's solely a single power borrower who uses your power for their magic, and though it's a secret they keep, their power is immense, and you and them have never truely seem one another before..

this was because of the fact that you were sealed away some long time ago. perhaps you have been some god, legendary creature or whatever it is that you would be. as the power borrower used you as a source, they also worshiped you in some manner and that basically made you become stronger in it's own right, so strong that you were able to simply destroy the seal you were sealed within.

As it was destoryed, your the power borrower was forced unconscious due to the immense surge in power that you accidentally sent off their way, causing you and them to temporarily mentally context, because of the odd circumstances. You both connected mentally, and you're in their head, but now you must introduce yourself, the power borrower doesn't know what's going on yet, or even that your in their mind as they're unconscious.