The enchantment theme, Rooms, manifest dread, eerie, the return of delirium, impending, glimmers, survival, overlords, and the way it all interacted with the graveyard was a huge success
Theres also a rainbow variant of the original art as well for those who want a more minimalist design
The second possibility is Wizards realized they could make more money by making the powerful cards harder to find, going so far as to intentionally put tournament playables at Mythic to increase profits
Other Yu-Gi-Oh
Prowess has proven itself as a powerful keyword time and time again, but thats not even the half of it here
Since the angels duplicate themselves with Myriad whenever they attack, just as long as you arent the player with the most life, cards in hand, and lands, youll likely be getting some benefit from them