Having the card draw to replace any of these dying is nice, but it comes in the form of Clue Tokens, slowing down how fast you can get the replacement cards
Other Budget Upgrades To Consider Tricky Terrain is focused almost entirely on lands, but Omo's ability works just as well on creatures
Once The Soul Stone is harnessed, harnessing it again has no additional benefit
It also has the potential to be the biggest eldrazi, caring about not just cards exiled with its own abilities, but from anywhere, making it paltry to get plenty of +1/+1 counters on it without casting
Westvale Abbey / Ormendahl, Profane Prince Westvale Abbey has a black color identity so it can't be played in every deck, but Ormendahl, Profane Prince is certainly worth going after in decks that can play it