pokemon sun and moon card packs & Sleeved Booster Pack – Common Lands art Trainers and TAG Pokemon Sun & Moon Burning

These are interesting designs, sure, but I think the best designs have occurred when Wizards tries to give players what they really want: a way to play with a bunch of instants to control how the game plays that somehow scales to Commander without relying on combos or reanimator

If you're less interested in winning and just want to have a good time and introduce some zany antics, it's hard to do much better than Scrambleverse

Time Stretch (Odyssey) Stretch of Time Sorcery Salvage Target player takes another turn after this one

That being said, Ugins Labyrinth has quite the downside and very specific deck building restraints