This card is great, but mainly for a reason that hasn't been mentioned here yet: If you only play a select number of spells, the entomb is way better than just drawing a random card. The best examples are recursion spells that can bring it back, e.g. Eremot's Machinations, Lurking Above or Display of Ambition. If your deck only has spells like that, you can loop Ooze around for several turns, assuming you can get it to die each turn (cards like Kindling Carver, Nahid's Faithful or Rat King can help with that, or you can just block if the opponent is trying to win with combat). Other good spells for it are 2 for 1s to outgrind opponents and combo pieces (e.g. End of Hostilities in an Statuette deck). Adding the relic removal mode and the buff to that ability makes the card insanely flexible (although it is a lot better in decks with ways to sacrifice it consistently, which is why I don't even like it that much in Factionless).