When combined with Path to Exile, Winds of Abandon and Settle the Wreckage, youre putting a lot of lands into play
His ward ability prevents opponents from targeting him unless they sacrifice a legendary artifact or creature, which is a hefty price to pay for a targeted removal spell which you'll likely have an answer for anyways
In fact, I can't even find a single Mythic Rare for which I can create an argument against its Mythicness by Wizards 's stated criteria
Sure, you have to give up four damage to get Refraction Elemental, but it should more than make up for this in just one turn on the battlefield, which should make defeating the battle worthwhile pretty often
Additionally, Rainbow Rare cards often featured powerful Pokemon GX or Trainer cards which were frequently included in competitive decks, making them just as valuable to players as they are to collectors
These stores are officially supported within the Pokmon ecosystem and often run events, leagues, and community activities