With Wizards new focus on inter-set synergy, I wouldn't be at all surprised to see at least one and possibly both of Gishath and Zacama in Commander Masters this summer
In other words, the existence of Expressive Iteration allows Midrange and Control decks to keep hands they would otherwise be forced to mulligan
From here, we see a drop-off in value, but not nearly as steep as the one in Game Over

0.3%inclusion 14.5K decks 4.75M decks Galadriel of Lothlrien 0.7%inclusion 14.5K decks 2.13M decks Assault on Osgiliath 0.3%inclusion 13.9K decks 4.75M decks Frodo Baggins 0.7%inclusion 13.8K decks 2.01M decks Shelob's Ambush 0.3%inclusion 13.4K decks 4.85M decks Bill the Pony 0.3%inclusion 13.3K decks 4.43M decks Hobbit's Sting 0.3%inclusion 13.3K decks 4.43M decks Celeborn the Wise 0.3%inclusion 13.1K decks 4.40M decks Dunland Crebain 0.3%inclusion 12.9K decks 4.85M decks Grma Wormtongue 0.3%inclusion 12.9K decks 4.85M decks Saradoc, Master of Buckland 0.3%inclusion 12.9K decks 4.43M decks Haunt of the Dead Marshes 0.3%inclusion 12.8K decks 4.85M decks Book of Mazarbul 0.3%inclusion 12.7K decks 4.75M decks Gollum, Scheming Guide 0.3%inclusion 12.6K decks 4.85M decks Galadriel, Gift-Giver 0.3%inclusion 12.6K decks 4.40M decks Lost Isle Calling 0.3%inclusion 12.6K decks 4.71M decks Frodo, Sauron's Bane 0.6%inclusion 12.2K decks 2.16M decks Legolas, Counter of Kills 0.6%inclusion 12.1K decks 2.13M decks Arwen's Gift 0.3%inclusion 12K decks 4.71M decks Isildur's Fateful Strike 0.2%inclusion 12K decks 4.85M decks The Black Breath 0.2%inclusion 11.8K decks 4.85M decks Swarming of Moria 0.2%inclusion 11.7K decks 4.75M decks Smite the Deathless 0.2%inclusion 11.7K decks 4.75M decks Wizard's Rockets 0.1%inclusion 11.4K decks 9.55M decks Shadow of the Enemy 0.2%inclusion 11.1K decks 4.85M decks Uglk of the White Hand 0.5%inclusion 11K decks 2.21M decks Shire Shirriff 0.2%inclusion 11K decks 4.43M decks Gorbag of Minas Morgul 0.2%inclusion 10.9K decks 4.85M decks Friendly Rivalry 0.5%inclusion 10.8K decks 2.07M decks Sauron, the Dark Lord 0.9%inclusion 10.8K decks 1.15M decks You Cannot Pass

If one of your favorite lands commanders isnt on the list, let me know in the comments

Marwyn, the Nurturer Marwyn, the Nurturer Illustration by Chris Rahn Commander (1) Creature (37) Regal Force Woodland Bellower Soul of the Harvest Primordial Sage Brutalizer Exarch Voice of the Woods Yeva, Nature's Herald Wirewood Channeler Temur Sabertooth Skyshroud Poacher Nullmage Shepherd Lys Alana Huntmaster Karametra's Acolyte Ivy Lane Denizen Immaculate Magistrate Heedless One Dwynen, Gilt-Leaf Daen Drove of Elves Wood Elves Timberwatch Elf Rishkar, Peema Renegade Jagged-Scar Archers Imperious Perfect Elvish Archdruid Sylvan Ranger Scryb Ranger Frontier Guide Elvish Visionary Elvish Vanguard Duskwatch Recruiter Wirewood Symbiote Nettle Sentinel Llanowar Elves Joraga Treespeaker Elvish Mystic Birchlore Rangers Arbor Elf Instant (3) Naturalize Nature's Claim Natural State Sorcery (15) Seasons Past Rishkar's Expertise Collective Unconscious Shamanic Revelation Skyshroud Claim Harmonize Explosive Vegetation Nissa's Pilgrimage Kodama's Reach Cultivate Rampant Growth Nature's Lore Broken Bond Wildest Dreams Animist's Awakening Enchantment (6) Rites of Flourishing Tranquil Grove Ground Seal Durable Handicraft Path of Discovery Vernal Bloom Artifact (4) Lifecrafter's Bestiary Prism Ring Elixir of Immortality Sword of the Animist Land (34) Elf ball decks like this Marwyn, the Nurturer build can be very exciting for new players
