Myriad is pretty strictly a multiplayer mechanic, as having myriad usually increases the mana value of a card, making it a little overcosted for 1-vs-1 play
A deck with Felix Five-Boots as the commander where your goal is to equip five footwear artifacts onto your commander falls into this category
Zenos yae Galvus / Shinryu, Transcendent Rival Rating: 9/10 Like Massacre Wurm or Harvester of Misery, the absurdity of a creature that comes down and has the potential to wipe the board with little effort is hard to ignore
Its honestly a blue players dream: plenty of counterspells, lots of card draw per turn cycle As the pace-setter, everybody immediately looks to you for permission whenever trying to cast something big
We elected to not do anything to them at this time, but if you think these enchantments should categorically be on the list, please let us know