The first brew I'd like to look at today was inspired originally by one Benjamin Weitz on the latest episode of the 2/3 fantastic Podcast Allied Strategies (https://alliedstrategiespodcast.wordpress.com/) The idea is, with a Panharmonicon out, Eldrazi Displacer plus Drowner of Hope (could be any card that makes multiple scions, but Drowner seems best) makes infinite Scions. Which also means infinite Mana, infinite taps, and, with Thought-Knot Seer, infinite milling. It was further devloped watching Kenji "Numot the Nummy" Egashira play a vaguely similar deck on his stream this week, though that one went into significantly more colors and was overall fancier I think, and a bit less focused on Eldrazi Displacer.
Given that I wanted to be Blue, White, and Colorless already, and with Eldrazi Displacer, I had to include my favorite Standard interaction, Eldrazi Displacer plus Spell Queller, which locks opponents out of casting cheap spells, once you have enough mana.
Speaking of mana, getting there is hard. Without painlands especially, fixing for this color combo is not great. Fortunately, Prophetic Prism helps us out. Plus Hedron Crawler is pretty nice in a deck that's looking to be pretty mana hungry anyway. I'm not sure that the current build is exactly where we need to be, but I think it's pretty close. We have a bit of an artifact theme built up, and so along with our ETB theme, Pilgrim's Eye made a lot of sense. with infinite mana, you can use the card to draw all the basics in your deck - along with Evolving Wilds, the Eye value makes you want to play a lot of basics, but I think it's worth it.
The deck is very raw and untuned. It likely doesn't have sufficient interaction right now, and the mix of creatures is probably not quite right. Crane Might also be not good enough to be a 4-of in the deck, though I think it's worth a try anyway.
The sideboard especially isn't very tuned. But it has some ideas, anyway.
The second deck I want to look at today is another Panharmonicon deck. This one is UR Colossus, which is reaosnably known. But my twist is to use Combustible Gearhulk for a bit more Oomph. It's another card with ETB triggers for Panharmonicon, a good emerge target for your EDF, your CMC are fairly high thanks to Colossus and EDF... this seems to be a pretty good deck for the card, and I'd like to see if we can make it work. Additionally, I'd like to note that the Sideboard plan goes in for big energy; some Whirler Virtuoso action, with the potential for infinite thopters - but even a lot of thopters is going to be nice. It's a nice way to diversify threats against control decks or Pick the Brain. There's a good chance you need more defense against the aggro decks, but I think this should be a fun starting point worth trying out.