I cant imagine many better creatures for an aggressive deck, and the only thing keeping it from a 10/10 in my eyes is that at 2 toughness, its pretty easy to kill with removal
A March of the Machine: The Aftermath epilogue booster contains only five cards , with a combination of 1-3 card(s) of rarity rare or higher and 2-4 uncommon cards
Players who log in during the campaign will receive two Legend Skills: Destiny Draw Path to Ultimate Dragon Knight for Yami Yugi and Seto Kaiba
In my opinion, these are the try-hard way to send cards through the mail and are mostly unnecessary compared to a standard toploader
There are a lot of cards at the $3-$10 range, including uncommon artifacts for Commander like Ashnod's Altar and Lightning Greaves
So, if your mana base can't reliably make all five colors, Leyline of Mutation can very quickly go from a reliable cost-reduction engine to completely unplayable