Grinding Breach
A Modern deck, by William Thompson
7th place at a tournament in Boston, Massachusetts, United States on 2020-03-07
As reported at http://www.starcitygames.com

Maindeck:

Artifacts
3 Engineered Explosives
4 Grinding Station
4 Mishra's Bauble
2 Wishclaw Talisman

Creatures
1 Thassa's Oracle

Enchantments
4 Underworld Breach

Instants
2 Galvanic Blast
3 Metallic Rebuke

Legendary Artifacts
3 Mox Amber

Legendary Creatures
4 Emry, Lurker of the Loch

Legendary Planeswalkers
1 Ashiok, Dream Render
3 Teferi, Time Raveler

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

Sorceries
2 Inquisition of Kozilek
1 Thoughtseize

Basic Snow Lands
3 Snow-Covered Island
1 Snow-Covered Mountain
1 Snow-Covered Plains
1 Snow-Covered Swamp

Lands
1 Flooded Strand
1 Hallowed Fountain
4 Polluted Delta
4 Scalding Tarn
1 Steam Vents
1 Watery Grave

Legendary Lands
1 Hall of Heliod's Generosity

Sideboard:
2 Tormod's Crypt
2 Fatal Push
2 Mystical Dispute
1 Wear
2 Urza, Lord High Artificer
2 Ashiok, Dream Render
1 Jace, Wielder of Mysteries
1 Shenanigans
2 Timely Reinforcements