This isnt a combination of colors that sees a lot of play in EDH
I ended up giving it the ability to tap for every color but green (as the mana cost covered making the card green)
There are of course cards that buck this trend and are successful on both ends of the spectrum, most recently Golos, Tireless Pilgrim and Niv-Mizzet Reborn, but for the most part this has been true throughout Magic 's history
You can then easily dump your infinite mana into your X spell or mana sink of choice (Comet Storm, Staff of Domination, etc.) to win the game or lock down the board
Tarkir: Dragonstorm Spoilers March 19 | New Surrak, Legendary Combo Enchantment and Jeskai Precon Tarkir: Dragonstorm Spoilers March 20 | New Zurgo, Mythic Reanimation Spell and Mardu Precon
Its a good few dollars cheaper than the rest of the cycle, as it had a printing in a Standard precon back in the Khans of Tarkir era, but its still a nice hit