Merfolk
A Modern deck, by david ernenwein
1st place at a tournament in Littleton, Colorado, United States on 2015-09-13
As reported at www.starcitygames.com

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
3 Master of Waves
3 Merrow Reejerey
4 Silvergill Adept

Enchantments
4 Spreading Seas

Instants
4 Path to Exile
2 Unified Will

Legendary Creatures
2 Kira, Great Glass-Spinner

Basic Lands
7 Island

Lands
3 Mutavault
4 Seachrome Coast
2 Tectonic Edge
4 Wanderwine Hub

Sideboard:
2 Chalice of the Void
2 Meddling Mage
2 Rest in Peace
2 Stony Silence
1 Dispel
2 Hibernation
1 Hurkyl's Recall
1 Unified Will
1 Kira, Great Glass-Spinner
1 Tectonic Edge