At a fundamental level, these decks have much in common with popular depictions of alchemy
In an article by Wizards of the Coast outlining the Stranger Things x Secret Lair release, only a cursory mention was made of the art being changed, and no explanation as to how it got through to being revealed was given
It doubles your treasure mana production, it has haste and flying so it can be effective immediately, and it still benefits you slightly when your opponents remove it with spells
Are you looking to practice and have some fun without any strings attached, or are you hoping to collect real, physical cards
Even if she dies in the early turns, she takes the spell with her to the afterlife, and that's one less removal spell your big guns need to worry about