Since youre not casting the spells, this circumvents Rule of Law effects, letting you load your deck up with as many variants of that stax piece as you can
Menace, haste, and five toughness will do that
Of course, there are stories of this thing completely changing the game, but in general, there is usually enough enchantment removal floating around that most of the time this will probably do nothing (expect possibly draw out that enchantment removal, but you dont usually want to approach the game like that, especially in multiplayer)
And they'll have whatever the aura is giving them as well
Outshining Cynthia, N, and Misty is no easy feat, but Lillie manages to pull it off, along with the help of her beloved Clefairy, who is pictured but not named on the card