Urza Ascendancy
A Modern deck, by Turner Maddick
2nd place at a tournament in Columbia, Missouri, United States on 2020-01-04
As reported at http://www.starcitygames.com

Maindeck:

Artifacts
2 Engineered Explosives
4 Mishra's Bauble
2 Sword of the Meek
3 Thopter Foundry
1 Witching Well

Enchantments
4 Jeskai Ascendancy

Instants
3 Metallic Rebuke

Legendary Artifacts
3 Mox Amber
4 Mox Opal (Banned in Modern)

Legendary Creatures
4 Emry, Lurker of the Loch
4 Urza, Lord High Artificer

Legendary Planeswalkers
2 Saheeli, Sublime Artificer

Snow Artifacts
4 Arcum's Astrolabe (Banned in Modern)

Sorceries
2 Thoughtcast

Basic Snow Lands
4 Snow-Covered Island
1 Snow-Covered Mountain
1 Snow-Covered Plains

Lands
1 Breeding Pool
4 Flooded Strand
1 Hallowed Fountain
1 Misty Rainforest
4 Scalding Tarn
1 Steam Vents

Sideboard:
1 Pithing Needle
1 Abrade
3 Galvanic Blast
2 Veil of Summer
2 Wear
2 Oko, Thief of Crowns (Banned in Modern)
2 Teferi, Time Raveler
2 Timely Reinforcements