Some of these cards are strictly better than others, but are harder to trigger
Now add to the mix Lands-matter pieces like Lotus Cobra, Nissa, Resurgent Animist, Amulet of Vigor, or Tiller Engine, and Lumra starts converting every returning Land into extra untapped mana, extra triggers, and a very real path to winning the game
If youre running it while focusing on enchantments, you want a critical mass of them
As someone whos lost so many games to board wipes, its amazing to have Elf commanders who dont immediately fold to a Wrath of God since Miara can at least refill your hand with more gas, not to mention giving you access to reanimation spells to get your army right back
And, importantly, against the deck that you most want to Mental Misstep against, various Delver decks, the cards that you really want to Misstep are their non-creature spells
Its an artifact token generator, a card draw engine, a cast-from-exile enabler, and just a fine reward for hitting opponents (AKA breaking faces)