Merfolk
A Modern deck, by Dwaine Hess
5th place at a tournament in Winchester, Virginia, United States on 2016-06-12
As reported at www.starcitygames.com

Maindeck:

Artifacts
4 Aether Vial
1 Relic of Progenitus

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

Enchantments
4 Spreading Seas

Instants
2 Dismember
1 Echoing Truth
2 Vapor Snag

Legendary Creatures
2 Kira, Great Glass-Spinner

Basic Lands
11 Island

Lands
2 Cavern of Souls
3 Mutavault
1 Tectonic Edge
2 Wanderwine Hub

Sideboard:
1 Grafdigger's Cage
1 Relic of Progenitus
2 Torpor Orb
1 Master of Waves
2 Tidebinder Mage
1 Sea's Claim
3 Hurkyl's Recall
2 Spell Pierce
1 Tectonic Edge