While obviously a versatile tool in numerous Commander decks, the Sword of Forge and Frontier is primarily played in Pioneer
Lunar Convocation Hidden Stockpile and Greed went into the WoTC blender to create Lunar Convocation, which feels a lot worse than I want it to be
Alternate Win Conditions While I like the idea of drawing cards, outvaluing your opponent, and winning with Adventure creatures, that wont be enough for a more powerful pod of players
A listing at TCGPlayer.com has a rare Sol Ring One Ring card serialized (with xxx / xxx) for $11,000
What I really love about this card is that it offers brewers the ability to think wayyyy outside the box, reaching for a world where they can get a bunch of artifacts into play more easily than other ramp options, with an end game that involves casting either a) a non-artifact spell that wouldnt normally be easy to ramp into and benefits from board state full of tapped artifacts or b) a cost reduction ability like the one on Etherium Sculptor that lets you chain a bunch of spells in a flurry for purposes yet unknown
I'll also give you two of my Honorable Mentions making this essentially a Top 12