Forgotten Cave and Lonely Sandbar can be cycled in the late game for more useful cards
So many of the other graveyard-centric commanders are basically engine cards that require opponents to have graveyard hate early and often to keep the deck from steamrolling all the opposition, and turns the game into Archenemy whether you want to play that way or not
This card absolutely terrorized my Commander games when I was 13, and I fully expect to have to play against it again soon enough
By morning, the fire was out and Ellwen was gone
Same thing for Night Soil and Commander 2013, Uncommon when drafted online but Common in paper
The incredible new Astral Dragon is a fantastic Commander card on its own, and if you happen to have a Cursed Mirror on the battlefield when you cast or otherwise bring Astral Dragon to the battlefield, you create two tokens that are copies of Cursed Mirror, and have those Cursed Mirror copies enter the battlefield as copies of Astral Dragon, which will enter the battlefield and can create two copies of Cursed Mirror, which then you get the idea