Looks like a good start to a deck! Only a few general points I'd bring up. First and most importantly, the curve seems really topheavy. It's really easy to get jammed up early game when you only draw 5+cmc cards and not enough lands. I decided to make some tough cuts (things that seem good, but you can win without using) in my Edgar deck. For instance, Sanguine Bond and Exquisite Blood. Certainly on point with theme, and yes, an instant (if not cheesy) win. But I'd much rather have a couple of vampires at 3cmc or less in those slots. Or even draw spells like Sign in Blood or Read the Bones.

Also, I can't overstate how good Cloudstone Curio is for this deck. Especially with the new Ixalan vamps having such good etb triggers.

my deck is found here: Markovia