Hello!
Im posting this today because it’s a HARD one.
This week’s NOP challenge is only cards with mana cost of 7 or less.
Also, please submit your ideas for future challenges 
Only colorless cards?
Oooo that’s a good one @Mainloop25
The Karn challenge @Mainloop25 ?
What’s Karn?
So far this week my handset has been favoring Greg to an unsavory extreme. The black node in Emrakul’s Corruption is usually my shoe-in to win with a Lily I Vampire build. I lost on all but the last charge (after a handful of change-ups) 
Then this morning Ob Nix actually popped his ultimate in Trials. That did not end well for me.
Yeah I’m in. Figure things can only get better B)
This was a fun challenge. Was actually looking at just one point dropped (won in 8 rounds ok Red node) with just the white node left. And I was cruising with no lost creatures and AI only had a Sage of Ancient lore 3/3 and I would win next round. Then Omnisience entered. I quit the game when the Sage hit 100/100.
I thought it would be a lot harder since many staple cards would be off limits. Guess I was a bit lucky mostly though since I got great synergy out of every deck with my pulls.
I would be curious to see what kind of decks were created for this challenge.
Okay I’ll bite.
Disclaimer: I went with the original, <=7 casting cost challenge, thinking that “colorless cards only” would be the next NOP challenge. Also, I’ll admit that there is 1 “Awaken” card that, while technically has a casting cost of 5 but “Awakens” at 14, hopefully this doesn’t violate the <=7 restriction.
Here are the 2 that I can currently view:
Jace II
Censor
Pull from Tomorrow
Imprisoned in the Moon
Imaginary Threats
Trail of Evidence
Sphinx Tutelage
Pyramid of the Pantheon
Vizier of Many Faces
Daring Sleuth
Startled Awake
This build was hands-down the most successful of the batch, albeit mythic-heavy.
Garruk
Dissenter’s Deliverance
Desert of the Indomitable
Rishkar’s Expertise
Blossoming Defense (or Plummet depending on opponent)
Harvest Season
Rhona’s Last Stand
Fertile Thicket
Nessa’s Pilgrimage
Corrupted Grafstone (or any other color changer)
Oviya Pashiri (for thopters, although seldom needed)
Simple strategy, blow up the board to build up loyalty and poop out wolves.
My other nodes:
Elspeth and her army of exerters. Sorry, no crazy cat lady.
Chandra I rocking her Go Goblins! Jersey
And a plain-jane Ob Nyx build containing ramp, 5 mana kills, tokens, and Eliminate the Competition to get around hexproofers…the usual.
Next week’s challenge is just to play NOP.
Turn to Frog has a casting cost of 9. Maybe you meant moon there?
I did, it is the Moon Prison (a new card for me). Edited.