If you don't want to cast the copy, you can choose not to

Disney Lorcana: Rise of the Floodborn Card List 1 Bashful, Hopeless Romantic Uncommon 2 Christopher Robin, Adventurer Rare 3 Cinderella, Ballroom Sensation Rare 4 Cobra Bubbles, Just a Social Worker Rare 5 Doc, Leader of the Seven Dwarfs Uncommon 6 Dopey, Always Playful Uncommon 7 Eudora, Accomplished Seamstress Common 8 Gaston, Baritone Bully Uncommon 9 Grand Duke, Advisor to the King Rare 10 Grumpy, Bad-Tempered Common 11 Happy, Good-Natured Common 12 King Louie, Jungle VIP Super Rare 13 Mickey Mouse, Friendly Face Super Rare 14 Mufasa, Betrayed Leader Legendary 15 Mulan, Free Spirit Common 16 Mulan, Reflecting Rare 17 Nana, Darling Family Pet Uncommon 18 Piglet, Very Small Animal Common 19 Rapunzel, Gifted Artist Uncommon 20 Rapunzel, Sunshine Common 21 Sleepy, Nodding Off Common 22 Sneezy, Very Allergic Common 23 Snow White, Lost in the Forest Common 24 Snow White, Unexpected Houseguest Uncommon 25 Snow White, Well Wisher Legendary 26 The Queen, Commanding Presence Super Rare 27 The Queen, Regal Monarch Common 28 Hold Still Common 29 Last Stand Uncommon 30 Painting the Roses Red Common 31 Worlds Greatest Criminal Mind Rare 32 Zero to Hero Uncommon 33 Dragon Gem Rare 34 Sleepys Flute Rare 35 Arthur, Wizards Apprentice Super Rare 36 Blue Fairy, Rewarding Good Deeds Uncommon 37 Chip the Teacup, Gentle Soul Common 38 Dr

Iconic cards are the rarest rarity in Lorcana, even rarer than Enchanted
Translated to MTG, and it can be relatively chumped somewhat safely, but it will never die in battle that way, at least not on its owner's turn
There is no limitation to this, and the player can pick any villain character their opponent has in play and immediately banish them, meaning an extremely buffed-up villain can be done away with in a single action
You can also swap them out for glass beads, six-sided dice, or bottle caps whatever you have to hand, really, works just fine