2 aces among aces back to back, this should be a significant impact not just on the empire but all the enemies of the empire. Moral goes down in the empire, while hope shines among the enemies, galvanizing them. Mary Sue being true to her name and establishing how far above she is and likely become a symbol of hope of all empire's enemies and unify them. And it would be cool Tanya beats her not through overpowering, but strategy and experience over a naive girl believing to be special because some god gave her brute magic strength. I think her greatest strength so far is experienced mages don't know how overpowering her spells are and that ends up being fatal enough. Had they known, their training and experience would have a better call on how to handle her despite her special powerup from god.