I played 4c Leovold Thieves (only green cards were Leovold and Grudge in the board) in the main event. Leovold and Notion Thief are very strong threats against Paradoxical. Went 3-0 and 2-1 and 2-0 split tickets in the sides. I had been testing and playing a Drain Gifts deck with packages like Tinker/Time Walk, Volt Key, YawgWill/Snap/Mission briefing to put together a win upon resolution but didn't feel confident so i went with my Night's Whisper Leovold/Thief/Dack/Kess valuetown control. Perfomed poorly, went 1-1-1 and drop.
Played the same in a few Challenges and overperformed. Went 3-0, 2-0 split tickets, 2-1.
Today i played 4 Challenges with Griselbrand Oath, and transform sideboard into Paradoxical. Went 3-0 tricking people into boarding dead cards :), then had a 3-0 repeat doing the same thing. It was nuts to see people play dead cards and go "hmmm, i thought you were on Oath" and i get to reply and say "Yea, well i was a while ago, then i sideboarded 12 cards". Also had Tinker/Colossus package in the Paradoxical board, which i would bring in with more artifact removal and a little mana vs Shops instead of boarding into Paradoxical.
Third side event i played Paradoxical first and boarded into Oath, for the funsies. Kind of a flex but was i was having a blast. Went 2-1 but i really only lost the one round due to variance and just nutty statistics. I can't be too salty but i feel some pride in how close it was and how much it was not my fault. I'm happy.
Fourth i went 2-1 playing an Oath control brew with 1 each Niv Mizzet, Dragonlord Dromoka, Griselbrand. I lost fair and square to another Oath deck. We played a stupid weird game. I didn't show him Oath/Orcahrd in our game 1 but he saw me playing Oath earlier and boarded his 4 Oaths out. I was sure he was on Oath although game 1 i didn't see an Orchard or Oath from him either, so i boarded out some Oaths. Our game was so stupidly durdle and we traded activating Orchards so that neither of could sneak an Oath trigger. Once he hit 2 Orchards, i hit 2 Orchards. I ended that game with 10 tokens and he hardcast Grisel, i hard cast Dromoka, and he had only 6 spirits (i couldn't keep up after he hit 3rd Orchard). It was just weird, a tiny bit awful, and a lot of fun. In hindsight i should have attacked with spirits and dared him to race me since he activated more fetches and cast more Painful Truths.
Niv Mizzet is super exciting! I'm not too super fond of the design space of "do X, draw a card" or cards with the design "here's 6 abilities that may or may not have to do with each other". But Niv is awesome. I got to live the dream of Oath into Niv Mizzet, Time Walk, Oath in Griselbrand. Played against shops and we were both 6/7 and they Metamorphed my Niv to have a blocker, i By Force their Niv and resolve Twister. Such a blast.