Merfolk
A Modern deck, by Mattheu Bangert
1st place at a tournament in Atlanta, Georgia, United States on 2016-06-05

Maindeck:

Artifacts
4 Aether Vial

Creatures
4 Cursecatcher
2 Harbinger of the Tides
4 Lord of Atlantis (Not currently legal in Modern)
4 Master of the Pearl Trident
4 Master of Waves
3 Merrow Reejerey
1 Phantasmal Image
4 Silvergill Adept
2 Tidebinder Mage

Enchantments
4 Spreading Seas

Instants
1 Dismember
1 Vapor Snag

Legendary Creatures
2 Kira, Great Glass-Spinner

Basic Lands
12 Island

Lands
2 Cavern of Souls
4 Mutavault

Legendary Lands
1 Minamo, School at Water's Edge
1 Oboro, Palace in the Clouds

Sideboard:
2 Relic of Progenitus
1 Tidebinder Mage
1 Dismember
1 Dispel
2 Gut Shot
4 Hurkyl's Recall
4 Tectonic Edge