Merfolk
A Modern deck, by Jon Toone
2nd place at a tournament in Dallas, Texas, United States on 2016-08-28
As reported at www.starcitygames.com

Maindeck:

Artifacts
4 Aether Vial

Creatures
4 Cursecatcher
4 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
4 Silvergill Adept

Enchantments
3 Sea's Claim
4 Spreading Seas

Legendary Creatures
2 Kira, Great Glass-Spinner

Basic Lands
13 Island

Lands
1 Cavern of Souls
4 Mutavault

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

Sideboard:
1 Grafdigger's Cage
2 Relic of Progenitus
3 Dismember
4 Hurkyl's Recall
1 Spell Pierce
3 Unified Will
1 Vapor Snag