Late-game, when everyone is looking to close out the game, then it seems fine
Sacrifice it at the beginning of the next end step if it has mana value 3 or less
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
It plays best with cards like Anikthea, Hand of Erebos and Starfield of Nyx that want enchantments in your graveyard
Again, it depends on your environment how deep you go with sideboard cards
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