Merfolk
A Legacy deck, by Joshua Cho
1st place at a Dark Ascension Legacy tournament in Buffalo, New York, United States on 2012-07-29

Maindeck:

Artifacts
4 Aether Vial

Creatures
2 Coralhelm Commander
4 Cursecatcher
4 Lord of Atlantis
4 Master of the Pearl Trident
4 Merrow Reejerey
4 Silvergill Adept

Enchantments
3 Standstill

Instants
3 Daze
2 Dismember
4 Force of Will
2 Spell Pierce

Basic Lands
12 Island

Lands
4 Mutavault
4 Wasteland

Sideboard:
1 Relic of Progenitus
3 Tormod's Crypt
2 Phantasmal Image
1 Blue Elemental Blast
1 Spell Pierce
4 Submerge
1 Umezawa's Jitte
2 Kira, Great Glass-Spinner