Modern Horizons 3 has brought with it a truly hideous new mythic for Modern, Necrodominance
This build will most likely go under the radar, so you need to be smart about who youre attacking and what youre saying not to paint a target on your back
With so many different multicolour lands available to us in Pioneer, the mana in three-colour decks will already be quite good, which eats into at least a bit of the appeal of playing Attune with Aether
I have quite a few cards without Flash, however, and I decided rather than cut them, to instead run Vedalken Orrery, Leyline of Anticipation and Teferi, Mage of Zhalfir
Madness especially is exciting to see more of, since a deck taking advantage of its unique discard/play mechanism now has more options from which to choose
Plate Armor It may not seem overtly powerful, but I think more equipment decks can benefit from Plate Armor