By favourite Uldra deck atm. A lot of inspiration came from daysundoing's SS Uldra Hour list, but I liked the idea of Primal adding Tamarys as a strong unit to shift back and Cartographer as a set-up tool. This deck plays a lot like a combo deck that can pressure with beat downs, which is an aspect I think should be leaned into.
*Update*
Some updates include a better powerbase and Nocturnal Observer. Having another early play to filter draws and dig towards Uldra is very important to the deck. Shakedown is here to fight Royal Decree, and the efficiency of Suffocate trumps other removal to help fight aggro.
*Update*
Small change that proved to be very effective is the addition of Grasping at Shadows over Dark Return. The potential of turn 5 Uldra is very strong here, and Dark Return will almost always get Uldra anyways, so shaving 2 power off that makes sense even outside of turn 5 Uldra.
The deck is very soft to aggro, and the matchup vs midrange/control is already strong enough that I'd consider trying to fight this matchup specifically.
Nocturnal Observer and Cenn Wastes Smuggler are the only "true" 3 drops in this deck. You'll happily discards the others, but they are still fine to play on their own. This deck has draws where it's happy to curve out and pressure with early Quake Titans and removal.
Potential considerations are fitting in Back-Alley Delinquent and Gustrider, likely at the expense of Nocturnal Observer and some interaction. Deck is overall strong, and once its learned is very effective on ladder.