The deck is entirely about casting and supporting enchantments: ramping them out with cards like Jukai Naturalist, draw cards with Sythis, Harvest's Hand, wiping opposing creatures with Doomwake Giant, and eventually overwhelming the table with cards like Sigil of the Empty Throne
Fabled Passage is a strictly better Evolving Wilds/Terramorphic Expanse, and I would encourage people to consider running some amount of fetch lands, even slower/cheaper ones, as they can be recurred fairly easily, help to fix mana, and can trigger certain abilities for sacrificing permanents or permanents leaving play
This may force a switch in meta that ends up reducing Mew's play, but we will see
Meanwhile, you can sneak into Angry Angel Mode very easily by having anything of your other creatures die
Both SR and SA versions feature the same Mew V stats and attacks the premium on the SA is entirely for the artwork