As for brand-new cards, Grist, the Hunger Tide is a creative and unusual planeswalker that's worth $16.83 right now
Since you're already running at least black and red, you probably have efficient single-target removal to handle that last creature if it does happen to be worth taking out
The local enchantments are signified by the enchantment subtype Aura
Deeproot Elite should be a staple in Merfolk decks in Standard, which should be very popular after the release of Rivals of Ixalan , especially if there is an energy ban, which is why I have the Merfolk creatures ranked ahead of the other tribes

Commander: Aminatou, the Fateshifter Creatures: Cryptic Annelid, Deepglow Skate, Doom Whisperer, Elite Guardmage, Enigma Sphinx, Ethereal Investigator, Glasspool Mimic, Lavinia of the Tenth, Minn, Wily Illusionist, Mistmeadow Witch, Psychosis Crawler, Rakshasa Debaser, Solemn Simulacrum, Soulherder, Suncleanser, Thieving Amalgam, Vendilion Clique, Wernog, Riders Chaplain, Whirlpool Rider Planeswalkers: Dakkon, Shadow Slayer, Jace, Arcane Strategist, Liliana Vess, Sorin, Grim Nemesis, Teferi, Who Slows the Sunset, Venser, the Sojourner Artifacts: Avarice Totem, Commanders Sphere, Fellwar Stone, Imposter Mech, Mishras Bauble, Scroll of Fate, Senseis Divining Top, The Chain Veil Enchantments: Counterbalance, Eyes Everywhere, Hedron Alignment, Leyline of Anticipation, Mastery of the Unseen, Oath of Gideon, Oath of Jace, Oath of Teferi, Primordial Mist, Pucas Mischief, Search for Azcanta, Soothsaying, Thought Reflection, Unfulfilled Desires Instants: Ancient Excavation, Commit // Memory, Consider, Eerie Interlude, Faithful Mending, Otherworldly Gaze, Scouts Warning, Sudden Substitution, Teferis Ageless Insight, Teferis Protection, Teferis Time Twist Sorceries: Akromas Vengeance, Aminatous Augury, Approach of the Second Sun, Farewell, Inevitable Betrayal, Time Warp Lands: 4 Island, 3 Plains, 2 Swamp, Ash Barrens, Bad River, Barren Moor, Blasted Landscape, Command Tower, Desert of the Glorified, Desert of the Mindful, Desert of the True, Drifting Meadow, Drowned Catacomb, Flood Plain, Forge of Heroes, Glacial Floodplain, Glacial Fortress, Ice Tunnel, Isolated Chapel, Lonely Sandbar, Polluted Mire, Raffines Tower, Remote Isle, Secluded Steppe, Snowfield Sinkhole, Temple of Deceit, Temple of Enlightenment, Temple of Silence, Underdark Rift A Lack of Miracles The biggest paradigm shift within this deck since my last discussion on it was the moving away from the manifest and miracles mechanics

If all of Brigid's Command's targets are illegal as it tries to resolve, it will do nothing