Merfolk
A Modern deck, by Brandon Nash
5th place at a tournament in Roanoke, Virginia, United States on 2015-12-12
As reported at www.starcitygames.com

Maindeck:

Artifacts
3 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 Merrow Reejerey
2 Phantasmal Image
4 Silvergill Adept
2 Tidebinder Mage

Enchantments
4 Spreading Seas

Instants
1 Spell Pierce
4 Vapor Snag

Basic Lands
12 Island

Lands
2 Cavern of Souls
1 Flooded Strand
4 Mutavault
1 Polluted Delta

Sideboard:
2 Grafdigger's Cage
1 Spellskite
2 Master of Waves
1 Monastery Siege
4 Sea's Claim
3 Hurkyl's Recall
2 Swan Song