Its a notorious combo piece in cEDH and Modern alike, acting as the linchpin of the bloodpod strategy (often tutoring for cards like Kiki-Jiki, Mirror Breaker)
Already an expensive card in its base version, Edgar Markov getting a dedicated print for Innistrad Remastered means that the headliner will likely sit at a couple of thousands of dollars in value
The digging is nice, sure, but spending five mana without affecting the battlefield can be risky
I hope well see more of this ability in the future, both on Ravnica and other planes
At four mana, he can sit at the top of your mana curve, and if you manage to drop a haste enabler such as Goblin Warchief, you can start doubling your goblins straight away (which then also have haste to attack the turn they enter)