Umori Simic Mutate
A Standard deck, by Willy Edel
1st place at a tournament on 2020-06-02

Maindeck:
9 Forest
4 Island

Artifact Creatures
1 Stonecoil Serpent (Not currently legal in Standard)

Creatures
4 Arboreal Grazer (Not currently legal in Standard)
4 Auspicious Starrix (Not currently legal in Standard)
3 End-Raze Forerunners (Not currently legal in Standard)
4 Gemrazer (Not currently legal in Standard)
2 Gilded Goose (Not currently legal in Standard)
4 Migratory Greathorn (Not currently legal in Standard)
4 Paradise Druid (Not currently legal in Standard)
4 Pollywog Symbiote (Not currently legal in Standard)
4 Pouncing Shoreshark (Not currently legal in Standard)

Lands
4 Breeding Pool (Not currently legal in Standard)
3 Castle Garenbrig (Not currently legal in Standard)
2 Castle Vantress (Not currently legal in Standard)
4 Temple of Mystery (Not currently legal in Standard)

Sideboard:
1 Stonecoil Serpent (Not currently legal in Standard)
2 Brazen Borrower (Not currently legal in Standard)
3 Frilled Mystic (Not currently legal in Standard)
2 Shifting Ceratops (Not currently legal in Standard)
3 Wicked Wolf (Not currently legal in Standard)
3 Questing Beast (Not currently legal in Standard)
1 Umori, the Collector (Not currently legal in Standard)