If you have, say, two Defiant Strikes from War of the Spark and two from M21
The key to this deck is prioritising aggressive creatures while playing as much flexible burn/removal as possible, to help your creatures hit as well as being able to send damage to their face if relevant
Shadow, Mysterious Assassin* The Final Fantasy 6 Commander Deck version of Shadow is a decent enough creature, but deathtouch isnt a great evasive ability and to make the best use of his ability he really needs to get in so you can sacrifice whatever permanent you sneaked in for cards and damage
Considering how many incredible chase cards are in Surging Sparks, it's surprising the Booster Box isn't going for more, but $249 is still nothing to sneeze at
Wizards of the Coast maintains an aggressive release schedule, often introducing 4-5 major expansion sets annually, each adding hundreds of new cards and numerous variants