The spells aren't exiled after casting either, allowing you to play the same powerful spell multiple times a turn
I was curious what sort of new cards with the bargain mechanic might be available in Simic, and sadly there arent many that would be worth the card slot in Commander, except for Troublemaker Ouphe, which is adorable, and its exile ability can be clutch to get rid of something like The One Ring
Sothera appears in multiple special treatments, including a rare textless version that captures the majesty of its supermassive black hole, emphasizing its significance as both a gameplay centerpiece and a showcase of Edge of Eternities' cosmic aesthetic
Amusingly, it could also be an answer for a Death and Taxes deck's most dangerous enemy, True-Name Nemesis, in versions that would choose to splash Black, but that's another story
Kolaghan's Command doesn't return a creature directly to the battlefield, but when the creature coming back to your hand is a 10/10 that costs one black mana, it might as well be doing exactly that
They are all 1/1 creatures that create a colorless 3/3 Golem artifact token when they enter