Merfolk
A Modern deck, by Ben Robinson
29th place at a tournament in Louisville, Kentucky, United States on 2017-09-16

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
3 Master of Waves
4 Merrow Reejerey
4 Silvergill Adept

Enchantments
4 Spreading Seas

Instants
4 Path to Exile

Legendary Creatures
1 Kira, Great Glass-Spinner

Basic Lands
4 Island

Lands
2 Hallowed Fountain
4 Mutavault
2 Polluted Delta
4 Seachrome Coast
4 Wanderwine Hub

Sideboard:
2 Rest in Peace
2 Stony Silence
2 Blessed Alliance
1 Celestial Purge
2 Dispel
1 Hurkyl's Recall
1 Negate
2 Unified Will
2 Fragmentize