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Simic Flash
A Standard deck, by Garrison Fogt
7th place at a tournament in Clarksville, Tennessee, United States on 2020-01-25
As reported at http://www.starcitygames.com

Maindeck:
8 Forest
6 Island

Creatures
4 Brazen Borrower (Not currently legal in Standard)
4 Brineborn Cutthroat (Not currently legal in Standard)
3 Frilled Mystic (Not currently legal in Standard)
4 Nightpack Ambusher (Not currently legal in Standard)
3 Wildborn Preserver (Not currently legal in Standard)

Enchantments
4 Omen of the Sea (Not currently legal in Standard)

Instants
1 Mystical Dispute (Not currently legal in Standard)
4 Opt (Not currently legal in Standard)
3 Quench (Not currently legal in Standard)
4 Sinister Sabotage (Not currently legal in Standard)
2 Thassa's Intervention (Not currently legal in Standard)

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

Sideboard:
2 Grafdigger's Cage (Not currently legal in Standard)
1 Lovestruck Beast (Not currently legal in Standard)
2 Nadir Kraken (Not currently legal in Standard)
3 Shifting Ceratops (Not currently legal in Standard)
2 Aether Gust (Not currently legal in Standard)
2 Chemister's Insight (Not currently legal in Standard)
1 Mystical Dispute (Not currently legal in Standard)
2 Negate