How multiplayer works in Slay the Spire 2

After learning the singleplayer basics of cardslinging your way up the tower, it's time to learn how Slay the Spire 2 multiplayer works. It's not that complicated, really, but I didn't expect the deckbuilding roguelite to add co-op to begin with, so I had trouble seeing Mega Crit's initial vision. It's as clear as day now.

I've been having blast deckbuilding and doodling with friends, and am happy to report multiplayer isn't some unfamiliar departure from solo spire runs. If you're ready to team up and give it a go...