Court of Grace grants you the monarchy, and an angel-level density of flying creatures makes keeping the crown a simple enough task
This allows the Druid to generate an infinite amount of green mana, making it the centerpiece of numerous potent combo decks
Its no surprise this has become a staple in Commander decks like Mishra, Tamer of Mak Fawa and Tawnos, Solemn Survivor, where bringing artifacts back from the graveyard is all part of the strategy
The first part of the card is a little reminiscent of Toxic Deluge[/tooltip] in that it can be a board wipe but lets you dictate how much of the board you want to kill
Players aren't excited about getting extra rares in packs when it's overwhelmingly likely they'll end up with more unwanted uncommons instead
That'll be down to how common the card is, as well as its relative weakness for play