This ability not only lets you slowly take down your opponents strongest blockers, but it also works incredibly well with other decks like Yawgmoth, Thran Physician, which also spreads -1/-1 counters around for your benefit
There is also less room in construction for things that cost six regardless of any mana returns they might offer
His Evasive ability means only characters with Evasive can challenge him, making him a formidable presence on the battlefield
Not that that's a bad start - the ability to dump three mana to go digging for creatures is a good sink for Commander games that go long, and it provides card selection in addition to raw card advantage, all while hitting the battlefield early
Gen 9 Pokmon like Miraidon, Koraidon, and the Ruinous Quartet headline this era, which reintroduced classic ex cards and gave us silver borders across the board
Auron, Venerated Guardian Auron, Venerated Guardians attack trigger is a repeatable Oblivion Ring effect, and mono-white has equipment and +1/+1 counters to pump it up and exile bigger creatures