Kethis + Mox Amber is such a strong engine that it will likely resurface at some point in non-rotating formats, reminding us theres always new deckbuilding gold to mine for
In fact, there is nothing strange about the Pyramid of Light, as it was something that Akhnadin created independently and then buried with Anubis, so it would be nothing strange even if you didn't know about it
The other push for commander is that its often seen as a place where kitchen table players get to play what they want, instead of what a format decides is necessary
Mono black decks dont really get to ramp very often, and one of their primary ways is sacrificing creatures but they need mana producing Altars, or a creature like Pitiless Plunderer in play to really pull it off
Nowadays, modern shiny cards function as standard ones with no deck restrictions
Pegasus as a means of reintroducing Diaha - battles played in ancient Egypt using monsters sealed in stone slabs - to the modern world