Izzet Flash
A Standard deck, by Brandon Banks
1st place at a tournament in Bristol, Tennessee, United States on 2019-12-08
As reported at http://www.starcitygames.com

Maindeck:
10 Island
4 Mountain

Creatures
4 Bonecrusher Giant (Not currently legal in Standard)
4 Brazen Borrower (Not currently legal in Standard)
4 Brineborn Cutthroat (Not currently legal in Standard)

Instants
4 Ionize (Not currently legal in Standard)
2 Negate
4 Opt (Not currently legal in Standard)
2 Quench (Not currently legal in Standard)
2 Ral's Outburst (Not currently legal in Standard)
2 Scorching Dragonfire (Not currently legal in Standard)

Legendary Artifacts
2 Embercleave (Not currently legal in Standard)

Legendary Creatures
4 Gadwick, the Wizened (Not currently legal in Standard)

Legendary Planeswalkers
1 The Royal Scions (Not currently legal in Standard)

Lands
2 Castle Vantress (Not currently legal in Standard)
1 Fabled Passage (Not currently legal in Standard)
4 Steam Vents (Not currently legal in Standard)
4 Temple of Epiphany (Not currently legal in Standard)

Sideboard:
2 Sorcerous Spyglass (Not currently legal in Standard)
3 Aether Gust (Not currently legal in Standard)
1 Disdainful Stroke
2 Flame Sweep (Not currently legal in Standard)
2 Fry (Not currently legal in Standard)
3 Mystical Dispute (Not currently legal in Standard)
2 Lava Coil (Not currently legal in Standard)