Instead, what Sefris is all about is dungeons and resurrections
Between 1,000 and 5,000, or greater than that, like card shop levels
Then, when you add in the second triggered ability, Relentless Dead becomes a force to be reckoned with
While it is niche - there needs to be a reason to have this in a Tron or Eldrazi sideboard, for instance - when it's powerful, it's really powerful
I must preface this discussion with the theory that by turn 5 (most of the time) you're either set up to win or fighting for a lucky break
Finally, I will open up the Uncompetitive Arena and throw in a popular commander with a deck generated by EDHREC and analyze how that commander with that deck would fare in this variant