Whirza
A Modern deck, by Dylan Donegan
1st place at a tournament in Cary, North Carolina, United States on 2019-09-08
As reported at http://www.starcitygames.com

Maindeck:

Artifacts
2 Chromatic Star
1 Ensnaring Bridge
1 Ichor Wellspring
4 Mishra's Bauble
1 Nihil Spellbomb
1 Pithing Needle
1 Pyrite Spellbomb
2 Sword of the Meek
4 Thopter Foundry

Creatures
3 Goblin Engineer

Instants
2 Galvanic Blast
2 Whir of Invention

Legendary Artifacts
4 Mox Opal (Banned in Modern)

Legendary Creatures
4 Urza, Lord High Artificer

Legendary Planeswalkers
2 Teferi, Time Raveler

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

Sorceries
2 Serum Visions

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

Lands
1 Breeding Pool
1 Hallowed Fountain
4 Polluted Delta
4 Scalding Tarn
1 Spire of Industry
1 Steam Vents
1 Watery Grave

Legendary Lands
1 Inventors' Fair

Sideboard:
1 Damping Sphere
1 Grafdigger's Cage
2 Magus of the Moon
1 Abrupt Decay
2 Assassin's Trophy
2 Ceremonious Rejection
1 Nature's Claim
1 Tezzeret, Agent of Bolas
2 Battle at the Bridge
2 Thoughtseize