The background is a dark purple miasma that his blue robes break through and that the butterfly seems to be dispelling, at least immediately around it
The idea is to play Archfiend and then play Metamorphic Alteration on an opponent's creature to turn it into an Archfiend of the Dross
Grolnok is everything you could want from a self-mill Commander in these colors: affordably costed, open-ended in deckbuilding requirements and templated to not lose its accrued value if removed
Aurelia's Fury Aurelia, the Warleader Borborygmos Enraged Deathpact Angel Domri Rade Duskmantle Seer Enter the Infinite Giant Adephage Gideon, Champion of Justice Hellkite Tyrant Lazav, Dimir Mastermind Lord of the Void Master Biomancer Obzedat, Ghost Council Prime Speaker Zegana
10 hours with Magic: The Gathering Arena got me back into trading card games Sparky rekindled
Additionally, there's no real reason to play this card when Three Steps Ahead is already so powerful, and only sees a max of one or two copies in current Azorius Control lists
