Crabvine
A Modern deck, by John Grier
3rd place at a tournament in New Holland, Pennsylvania, United States on 2020-01-05
As reported at http://www.starcitygames.com

Maindeck:

Creatures
4 Gravecrawler
3 Gurmag Angler
4 Hedron Crab
4 Merfolk Secretkeeper
4 Narcomoeba
4 Prized Amalgam
4 Stitcher's Supplier
4 Vengevine

Instants
1 Once Upon a Time (Banned in Modern)

Sorceries
4 Creeping Chill
3 Glimpse the Unthinkable
2 Memory Sluice

Basic Lands
2 Swamp

Lands
4 Bloodstained Mire
3 Overgrown Tomb
4 Polluted Delta
3 Verdant Catacombs
3 Watery Grave

Sideboard:
3 Assassin's Trophy
3 Fatal Push
3 Force of Negation
3 Ashiok, Dream Render
3 Oko, Thief of Crowns (Banned in Modern)