Merfolk
A Modern deck, by Justin LaRocque
1st place at a tournament in Danbury, Connecticut, United States on 2016-09-18
As reported at www.starcitygames.com

Maindeck:
12 Island

Artifacts
4 Aether Vial

Artifact Creatures
1 Spellskite

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
1 Phantasmal Image
4 Silvergill Adept

Enchantments
3 Sea's Claim
4 Spreading Seas

Instants
2 Dismember

Legendary Creatures
1 Kira, Great Glass-Spinner

Lands
2 Cavern of Souls
4 Mutavault
1 Wanderwine Hub

Legendary Lands
1 Minamo, School at Water's Edge

Sideboard:
3 Chalice of the Void
2 Grafdigger's Cage
1 Relic of Progenitus
1 Spellskite
1 Dismember
2 Echoing Truth
3 Hurkyl's Recall
2 Spell Pierce