What if, during Harry's fight with Quirrellmort for the Philosopher's Stone, the Orb of Agamotto notified the Sorcerer Supreme of something in Scotland that required his attention? AU pretty quickly, slight Dumbledore-bashing. Please review!

It's been 1500 years and Merlin is still watching and waiting for his king to return never getting involved, but when there is a massive spike in his magic, can he just lurk in the shadows any longer? Merlin becomes the new defence against the dark arts teacher at Hogwarts under the name of Mryddin Emrys join him as he seeks to protect the old world and the new.