MTG Horde Mode!
A coworker reccomend something called 'Horde Mode' to me at work the other day and I tried it and it's neat!
You basically play against an automated deck that slings large amounts of creatures at you, usually following a theme like zombies or dinosaurs or nature, and you have to survive and defeat the Horde deck and kill all of it's creatures! It's quite difficult, and can be very volatile, but as someone who enjoys the many different ways to play Magic, I enjoyed it!
Over the last few days I played against a few different horde decks via the Against the Horde Website! I've mostly played solo, but I also got in a game with my partner as a fun co-op experience!
I've only won twice, one of which was tonight while playing the Ixilan Vampire Pre-con vs the Dino Horde (for max Ixilan flavor)! It is funny cause it does feel a bit like you're playing with an excel sheet when you have a bunch of triggers going off and you're putting counters everywhere and stuff.
Overall I'd reccomend it if you want a fun way to play solo or co-op with a group!