Simic Flash
A Standard deck, by Noam Zimet
1st place at a tournament in Magic Arena on 2020-08-04

Maindeck:

Creatures
4 Brazen Borrower (Not currently legal in Standard)
4 Brineborn Cutthroat (Not currently legal in Standard)
4 Frilled Mystic (Not currently legal in Standard)
4 Nightpack Ambusher (Not currently legal in Standard)
4 Paradise Druid (Not currently legal in Standard)
4 Spectral Sailor (Not currently legal in Standard)

Enchantments
2 Shark Typhoon (Not currently legal in Standard)

Instants
4 Essence Scatter (Not currently legal in Standard)
4 Rewind (Not currently legal in Standard)
2 Sublime Epiphany (Not currently legal in Standard)

Basic Lands
6 Forest
6 Island

Lands
4 Breeding Pool (Not currently legal in Standard)
4 Ketria Triome (Not currently legal in Standard)
4 Temple of Mystery (Not currently legal in Standard)

Sideboard:
2 Cerulean Drake (Not currently legal in Standard)
4 Aether Gust (Not currently legal in Standard)
1 Narset's Reversal (Not currently legal in Standard)
4 Negate
2 Quench (Not currently legal in Standard)
2 Uro, Titan of Nature's Wrath (Not currently legal in Standard)