Merfolk
A Standard deck, by Ted Felicetti
11th place at a tournament in Philadelphia, Pennsylvania, United States on 2018-01-27

Maindeck:

Artifact Creatures
4 Metallic Mimic (Not currently legal in Standard)

Creatures
4 Deeproot Elite (Not currently legal in Standard)
4 Jungleborn Pioneer (Not currently legal in Standard)
4 Kumena's Speaker (Not currently legal in Standard)
4 Merfolk Branchwalker (Not currently legal in Standard)
4 Merfolk Mistbinder (Not currently legal in Standard)
4 Silvergill Adept (Not currently legal in Standard)

Enchantments
2 Deeproot Waters (Not currently legal in Standard)

Instants
4 Unsummon (Not currently legal in Standard)

Legendary Creatures
4 Kumena, Tyrant of Orazca (Not currently legal in Standard)

Legendary Planeswalkers
2 Nissa, Steward of Elements (Not currently legal in Standard)

Basic Lands
5 Forest
5 Island

Lands
4 Botanical Sanctum (Not currently legal in Standard)
4 Unclaimed Territory (Not currently legal in Standard)
2 Woodland Stream (Not currently legal in Standard)

Sideboard:
2 Aethersphere Harvester (Not currently legal in Standard)
2 Tempest Caller (Not currently legal in Standard)
3 Shapers' Sanctuary (Not currently legal in Standard)
3 Essence Scatter (Not currently legal in Standard)
2 Naturalize (Not currently legal in Standard)
3 Negate