Reversible cards are double-sided Magic: The Gathering cards that have the same functional card on each side.
Each side has different art. You can swap which side you want to show off when casting the spell, or just stick with your favorite. It's just another way you can express yourself when playing the game.
- Wizards of the Coast (November 18, 2021). "Your Superdrop Super-Invite for Secret Lair's Second Secretversary Party!". magicthegathering.com. Wizards of the Coast.