Simic Merfolk
A Modern deck, by flatnose
6th place at a tournament in Magic Online on 2020-06-17

Maindeck:

Artifacts
4 Aether Vial

Creatures
2 Brazen Borrower
4 Kumena's Speaker
4 Lord of Atlantis (Not currently legal in Modern)
4 Master of the Pearl Trident
4 Merfolk Mistbinder
4 Merfolk Trickster
4 Silvergill Adept

Enchantments
4 Spreading Seas

Instants
2 Dismember
4 Force of Negation

Basic Lands
4 Island

Lands
4 Botanical Sanctum
1 Breeding Pool
2 Cavern of Souls
2 Flooded Strand
3 Mutavault
4 Waterlogged Grove

Sideboard:
3 Chalice of the Void
4 Relic of Progenitus
3 Tidebinder Mage
3 Deprive
2 Weather the Storm