However, a better alternative might be the card Elixir of Immortality, which not only shuffles the graveyard back into the library but also gains life and can be reused multiple times
But beyond decks that want Devils or group-slug, its unlikely to see as much play as it maybe should
This zombie version of Xathrid Necromancer is a huge boon in just about any Zombie deck, passively generating an absurd amount of free tokens as you do regular zombie things like draw cards off Wilhelt, the Rotcleaver, tutor with Corpse Harvester, kill stuff with Ravenous Rotbelly, etc
Its already taking over the metagame
however, your Commander sits to one side of your deck, setting its theme and playable from there
Check surface, corners, edges, and centering