Lots of decks have Uro or Cauldron Familiar, sure, and Ooze has some incidental value there, but Ooze makes your deck better by being a pretty dedicated hate card against graveyard decks while being in your starting 60
and if you attend a draft, keep in mind that the selection of TDFCs is public information which you can use to determine what lanes might be open
We actually wrote a whole Commander Deck Tech about Karumonix, though, which will make his value far more clear than a single blurb could manage, so check it out if youre interested
The card slinger has two drawers, one to fit sleeved cards of various sleeve types
but pretty descriptively right
While there aren't a ton of sacrifice payoffs available at lower rarities, the high rarity has cards like Sephiroth, Fabled SOLDIER and Zodiark, Umbral God as fantastic top-ends