Gemstone Mine enters the battlefield with three mining counters on it.
T, Remove a mining counter from Gemstone Mine: Add one mana of any color to your mana pool. If there are no mining counters on Gemstone Mine, sacrifice it.
Of all the 5 color lands, Gemstone Mine is one of my favorites. No damage like City of Brass or Mana Confluence. No mana costs like Rupture Spire. Don’t need an artifact like Glimmervoid.
Sure, it can only be used three times but that’s fine with me. The access to every color is worth it. Whether it’s in a competitive combo deck, kitchen table brews, or even Commander. Just give me the colors.