Mood Swings is Mark Rosewater's new trading card game where every card is a mood or emotion. It is designed to be playable straight out of the box with no prior card game experience required. This complete beginner's guide covers how the game works, what every card element means, how scoring works, how rounds are won, and what some of the cards actually do so you know exactly what you are getting into before your first game.

Mood Swings is a standalone trading card game designed by Magic: The Gathering head designer Mark Rosewater. He first came up with the concept in 1998 and spent 28 years trying to get it made. It finally debuted at MagicCon Las Vegas in May 2026 and goes on sale June 1 exclusively through Secret Lair for $25. Here is everything you need to know about what Mood Swings is, how it plays, and why it took nearly three decades to get here.