The warmage writhes as the lightning hits her. However, she does not move backwards 10 feet, but stays hovering in place.
Spoiler: Insight 13+, advantageThis is an illusory double. The real mage is invisible somewhere else in the room.
Spoiler: Ttharg, ForkTtharg, as you channel magical energy away from the power core, your connection to Bahamut and focus on the core leads you to sense a weak draconic presence hidden inside the flames of the artificial star. Fork, you have been sensing this presence since before you entered the room, but now know it comes from inside the core.