Mono-Blue Aggro
A Standard deck, by Joe Bernal
1st place at a tournament in Niles, Illinois, United States on 2019-03-16
As reported at http://www.starcitygames.com

Maindeck:

Creatures
4 Merfolk Trickster (Not currently legal in Standard)
4 Pteramander (Not currently legal in Standard)
4 Siren Stormtamer (Not currently legal in Standard)
2 Surge Mare (Not currently legal in Standard)
4 Tempest Djinn (Not currently legal in Standard)

Enchantments
4 Curious Obsession (Not currently legal in Standard)

Instants
3 Dive Down (Not currently legal in Standard)
2 Essence Capture (Not currently legal in Standard)
1 Negate
4 Opt (Not currently legal in Standard)
3 Spell Pierce (Not currently legal in Standard)
4 Wizard's Retort (Not currently legal in Standard)

Sorceries
1 Entrancing Melody (Not currently legal in Standard)

Basic Lands
20 Island

Sideboard:
2 Surge Mare (Not currently legal in Standard)
2 Deep Freeze (Not currently legal in Standard)
4 Chemister's Insight (Not currently legal in Standard)
2 Disdainful Stroke
1 Essence Capture (Not currently legal in Standard)
3 Negate
1 Entrancing Melody (Not currently legal in Standard)