On paper, it seems pretty balanced and self-restricting, for sure there won't be any oppressive card with this ability
Essentially its a pay to win game and only in a very tempered group that sticks to formats and limiting budget does the game become reasonably fun
Again, it depends on your environment how deep you go with sideboard cards
That Bonder's Ornament will be surprisingly useful when you find yourself needing an answer in a couple of turns
One possibility is to cast Apocalypse, a card that gets rid of everything, including your hand, leaving you only with Barren Glory, but that needs to be done on your upkeep, so there are options like Leyline of Anticipation or Emergence Zone to give these spells flash
Marchesa, the Black Rose : When I build Marchesa decks, I use plenty of creatures that naturally enter the battlefield with +1/+1 counters, which means that, with Marchesa, the Black Rose on the battlefield, we can feed one to emerge without going down a card