The most popular options before were partners Ravos, Soultender & Tymna the Weaver, Athreos, God of Passage, and Ayli, Eternal Pilgrim, all supporting both Cleric themes of Lifegain and Sacrifice
So, thematically, this Jumbo Cactuar card ticks off all the boxes of the original: Hes difficult to kill at seven defense, though not impossibly so
Wrenn and Six put in a lot of work picking off their earlier creatures, while Ephemerate makes it difficult for those decks to remove your threats
While Mirri, Weatherlight Duelist, unfortunately, wont protect you from board clearing removal spells, her ability that prevents more than one creature from attacking you while shes tapped isnt to be dismissed
Logistically, the value of the deck is almost entirely tied to two cards thatll likely tank in price, though having those reprinted is a big deal
Not being good at drawing cards may be fine in other formats, but in Commander it's an absolute necessity, so this outdated view of the color pie is a major factor in why Mono White struggles in Commander