They are rare and undocumented, presumably just a production variation that was overlooked
It won't quite always have them -- Glimmers are around, including at lower rarities -- but it has them often enough to be a nice 5-drop, especially in decks that care about Enchantments
your whole deck at this point), and you get any number of lands you find there (the rest of them) right onto the battlefield
They are very strong in equipment decks where the Commander gets value equal to the number of equipment on them as well as cheap for cast triggers, but they need more play there since they seem like auto-includes
Also known as SAR cards, these gems have the potential to shoot up in value after an expansion set release
Creatures like [c]Yisan, the Wandered Barn[/c] and [c]Urza, Lord High Artificer[/c] are two great combo commanders