Previously, these filled the role of being the standard set booster pack used to build decks and casual collections
Artifacts can be even harder to remove, and aggressive decks can punish black quickly, especially when its spending life to fuel its game plan
Normally that would mean you can only use that mana for Instants and activated abilities, but Mai and Zuko add two more card types to the list
The best part about Marvel decks is the use of Energy with your marquee artifact isnt even the only way to win, as Marvel decks pack other cards like Whirler Virtuoso, Architect of the Untamed, or Aethertorch Renegade
This part is a personal preference, but I also just find hyper-specific protection mechanics funny from a lore standpoint
Original MTG cards must show through a certain amount of light