pokemon mega rayquaza booster box XY: Roaring Skies The booster box artwork for

Sure, you can pay to not have the trigger countered, but landfall decks get turned on their heads when they have to be brought back down to Earth and pay for their value

Additional Squirrels allow for infinite mana

When I put this deck in TappedOut.net, that was the nominal Commander listed for the deck, but for our non-legendary Commander game it was Shimmer Dragon in the Command Zone

Pressure tactics

This is a very conflict averse deck: very few of the characters here are equipped to win challenges

Mega Starmie fits perfectly (no pun intended) into the Froslass/Munkidori archetype, and it has been proven in the Japanese formats