I was recently setting up some roleplaying and looked over the MTG-inspired sourcebooks. I think that's Ravnica, Strixhaven, Theros, maybe another?

I thought of those because they were settings I might know better than the other players so ones I could usefully run a published adventure with less risk of running something someone else had already ran or wanted to run.

However, it seems like they each had REALLY great flavour, I was very impressed by the setting and rules. But not a great campaign. I'm not sure if Ravnica and Theros had a campaign at all, and Strixhaven had a "year by year at university" campaign (like adult harry potter) and did the school things well but didn't have a sense of urgency or import in the over-arching plot.

There are AFAIK:

• Plane Shift Amonkhet
• Plane Shift Dominaria
• Plane Shift Innistrad
• Plane Shift Kaladesh
• Plane Shift Zendikar
• Plane Shift Ixalam & An adventure to go with it
• Mythic Odysseys of Theros
• Guildmasters' Guide to Ravica
• Strixhaven: Curriculum of Chaos

All of them that I read were really impressive. Ravnica seems like a great setting to run one-offs or campaigns endlessly. A friend noted how the urban setting actually allows to run some fantasy-setting Shadowrun-style adventures and they actually translate really well - simply replace megacorps with guilds and all tech with magic.

The Ixalan adventure "X MARKS THE SPOT" seems like a good place to start if you want to run something pre-made, but don't want to commit to a campaign.

You could also look at https://ravnicacardsconverted.tumblr.com/, but I'm not sure how those conversion mesh with the official Guildmasters' Guide to Ravica

Oh cool! That's more than I'd remembered!

and also I knew tehre was another tumblr I was forgetting about: https://5ecardaday.tumblr.com/