Unraveled: modern-day Arthurian urban fantasy

I'm at the height of my powers, but I have nothing. My selfless wife sacrificed her life to prevent a catastrophe. Now I'm left with the flimsy promise of her return and a dubious mission. As newly minted ruler of the elemental world, I'm in charge of tremors and quakes for the entire Earth. It's a big change-I've spent centuries looking out for number one-but my humanity erodes with every disaster. When a former student returns to spread fiery destruction over my turf, it's my duty to squash the offender. Fires spring up faster than I can smother them. When I'm framed for arson, police cut the last tethers of my feeble human existence. I'm on the run, without home, paying job, or lover. There's nothing left for me. I need to snuff out this pyromaniac and focus on my elemental reign. Is my humanity worth saving? Or should I embrace the elemental life once and for all? I am Merlin-now and forever.