# Sky Diamond Sky Diamond is a straightforward mana rock from Commander 2014 that produces blue mana while fixing colors in limited formats. Collectors view it as a functional reprint in a long line of similar diamond artifacts, alongside cards like Mountain Valley and its color variants. The card holds modest appeal primarily to Commander players seeking budget-friendly mana acceleration rather than to serious collectors. The uncommon rarity and nonfoil-only printing limit its collectibility. Sky Diamond represents the kind of utility card that fills deck slots without commanding premium value. It matters mainly as a practical tool rather than a sought-after piece, making it typical of the supporting cast in Commander preconstructed decks rather than a standout collectible.