Merfolk
A Modern deck, by David Warshawsky
8th place at a tournament in Duluth, Georgia, United States on 2015-04-12
As reported at www.starcitygames.com

Maindeck:

Artifacts
4 Aether Vial

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

Enchantments
4 Spreading Seas

Instants
2 Dismember
1 Vapor Snag

Legendary Creatures
2 Kira, Great Glass-Spinner

Basic Lands
13 Island

Lands
3 Cavern of Souls
4 Mutavault

Sideboard:
3 Chalice of the Void
1 Relic of Progenitus
1 Spellskite
2 Sower of Temptation
1 Tidebinder Mage
1 Dismember
1 Echoing Truth
1 Hurkyl's Recall
2 Spell Pierce
2 Swan Song