These cards are hard stax pieces, like Armageddon (lands), Jin-Gitaxias, Core Augur (hands), Hall of Gemstone (two or more mana colors), Iona, Shield of Emeria (spells of a specific color) Stasis (untap step) and Blood Moon (color fixing from nonbasics) all jump the fence and land squarely in the realm of shutting off decks either entirely or in part, keeping people from playing the game almost at all on their own once online depending on the meta
This is because Cauldron's Gift doesn't target the card that you'll return
Partner (You can have two commanders if both have partner.) Whenever Slurrk or another creature you control dies, if it had a +1/+1 counter on it, put a +1/+1 counter on each creature you control that has a +1/+1 counter on it
While it is still very powerful and rightfully Limited, this one change made it far less broken
5 Soul Diviner Turn Them Into Cards A bit harder to slot into decks given its blue and black mana commitment, Soul Diviner gives you a much more solid trade off for those finality counters