pokemon enhanced booster box Mega Evolution Sealed Case – MHDEALSPLUS it offers an expansive selection of cards to build powerful decks Pokemon Mega Evolution ME1 Booster

Lets say the player reveals a swamp

We have a multitude of effects that increase our creatures' power and toughness, increasing our deck's aggressiveness, such as Chief of the FoundryChief of the Foundry, Steel OverseerSteel Overseer, and the above mentioned Master of EtheriumMaster of Etherium, each helping to sculpt the ideal environment for the Urza Constructs to frolic and cause mayhem

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Since Mirko offers the best fit and is the box-topper for the deck, stick with Mirko as the commander

Probably something no one had ever called in the history of Magic with Ashes of the Fallen (It was a couple of months post release)