But yeah, its effect, however superb in the right scenario, is quite narrow, mostly dooming Ouphe to sideboards
Mostly as a way to dig deeper into the deck to find the real ways to get card advantage

Full Decklist Afterlife from the Loam Amphin Mutineer Arcane Signet Avenger of Zendikar Casualties of War Cephalid Coliseum Colossal Grave-Reaver Command Beacon Command Tower Conduit of Worlds Consuming Aberration Contaminated Aquifer Crawling Sensation Crypt of Agadeem Cultivate Darkwater Catacombs Dauthi Voidwalker Disciple of Bolas Diviner of Mist Dreamroot Cascade Drownyard Temple Essence Anchor Exotic Orchard Farseek Fetid Pools Floral Evoker Forbidden Alchemy Foreboding Landscape Forest (x6) Golgari Rot Farm Grapple with the Past Gravecrawler Grisly Salvage Harrow Haunted Mire Hedron Crab Hinterland Harbor Island (x4) Jarad, Golgari Lich Lord Junji, the Midnight Sky Kishla Skimmer Kotis, Sibsig Champion Lethal Scheme Life from the Loam Living Death Llanowar Wastes Lord of Extinction Lord of the Forsaken Memorial to Folly Meren of Clan Nel Toth Millikin Multani, Yavimaya's Avatar Myriad Landscape Necromantic Selection Necropolis Fiend Noxious Gearhulk Nyx Weaver Ob Nixilis, the Fallen Opulent Palace Phyrexian Reclamation Putrefy Rampant Growth Reassembling Skeleton River Kelpie Sakura-Tribe Elder Satyr Wayfinder Shigeki, Jukai Visionary Skull Prophet Sol Ring Springbloom Druid Steward of the Harvest Stitcher's Supplier Sunken Hollow Swamp (x5) Tasigur, the Golden Fang Tear Asunder Temple of Malady Terramorphic Expanse Teval, the Balanced Scale Teval's Judgment Timeless Witness Treasure Cruise Victimize Welcome the Dead Will of the Sultai Woe Strider Wonder Woodland Cemetery Mardu Surge The Mardu are all about coordinated attacks, and Mardue Surge plays into that with a go-wide token deck that not only wants you to swing, but also sacrifice those tokens for extra profit

There are still a couple upgrades we can do to make the deck better
Kumena, Tyrant of Orazca Kicking things off with perhaps the best MTG commander for a Merfolk tribal deck we have Kumena, Tyrant of Orazca
The card was inserted into the marriage invitation, it is not known at the moment of how many of them were sent and how many sheets were printed