Simic Flash
A Standard deck, by Daniel Duan
16th place at a tournament in Columbus, Ohio, United States on 2020-01-05
As reported at https://old.starcitygames.com/events/040120_columbus.html

Maindeck:

Creatures
2 Brazen Borrower (Not currently legal in Standard)
4 Frilled Mystic (Not currently legal in Standard)
2 Hydroid Krasis (Not currently legal in Standard)
4 Nightpack Ambusher (Not currently legal in Standard)
3 Paradise Druid (Not currently legal in Standard)

Instants
2 Aether Gust (Not currently legal in Standard)
4 Growth Spiral (Not currently legal in Standard)
2 Mystical Dispute (Not currently legal in Standard)
1 Negate
3 Quench (Not currently legal in Standard)
3 Sinister Sabotage (Not currently legal in Standard)

Legendary Planeswalkers
4 Nissa, Who Shakes the World (Not currently legal in Standard)

Basic Lands
7 Forest
7 Island

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

Sideboard:
2 Sorcerous Spyglass (Not currently legal in Standard)
4 Lovestruck Beast (Not currently legal in Standard)
1 Kenrith's Transformation (Not currently legal in Standard)
2 Aether Gust (Not currently legal in Standard)
1 Chemister's Insight (Not currently legal in Standard)
1 Commence the Endgame (Not currently legal in Standard)
2 Mystical Dispute (Not currently legal in Standard)
2 Return to Nature