Its especially surprising that its cEDH thats doing it, given that Ophidian Eye costs 3 mana, but apparently this is good enough in some Malcolm, Keen-Eyed Navigator or Niv-Mizzet, Parun decks
The concept is quite similar in Constructed formats, but following the advice of MTG player and mathematician Frank Karsten, the optimal range for adding another color to your deck in a 60-card format is approximately 12 to 13 sources of mana per color
Wrap Up Gond Gate | Illustration by Kamila Szutenberg When combat damage starts to bore you, when millings lost its luster, and Approach of the Second Sun feels too dirty, Maze's End is there for you
To be fair, though, neither is the opponent
They have a black star () rarity symbol and are generally more valuable than regular rare cards