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Simic Urza
A Modern deck, by James Johnston
1st place at a tournament in Frankenmuth, Michigan, United States on 2019-12-28
As reported at http://www.starcitygames.com

Maindeck:

Artifacts
1 Aether Spellbomb
3 Engineered Explosives
4 Mishra's Bauble

Creatures
4 Gilded Goose

Instants
3 Cryptic Command
4 Metallic Rebuke

Legendary Artifacts
4 Mox Opal (Banned in Modern)

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

Legendary Planeswalkers
2 Karn, the Great Creator
4 Oko, Thief of Crowns (Banned in Modern)

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

Basic Snow Lands
1 Snow-Covered Forest
4 Snow-Covered Island

Lands
1 Breeding Pool
4 Misty Rainforest
2 Mystic Sanctuary (Banned in Modern)
2 Polluted Delta
4 Scalding Tarn
1 Watery Grave

Sideboard:
2 Damping Sphere
1 Engineered Explosives
1 Ensnaring Bridge
1 Mycosynth Lattice (Banned in Modern)
1 Pithing Needle
1 Tormod's Crypt
2 Assassin's Trophy
2 Fatal Push
2 Veil of Summer
2 Thoughtseize