Proliferate is a keyword action that lets you choose any number of players or permanents and put an extra counter on them for each type of counter already there
Black and white also both excel at recursion, so you can rebuy cheap utility enchantments like Hopeless Nightmare to get multiple triggers in the late game
I can't remember a single player from the Scepter's glory days that played it without being both a good player and a good deck designer
Add to that the fact that this is an easily-killable planeswalker and I'm skeptical how Quintorius will perform out of the box
As a hasty boi that is also indestructible and flying if you have unspent mana, I feel like Ozai can become quite the threat when built properly
In the larger world of commander, this also means easier activations on land like Cabal Stronghold, Kessig Wolf Run, Rogues Passage, Gavony Township and the Kamigawa Neon Dynasty channel lands like Boseiju, Who Endures on top of their reductions already, just to name a few