Sure, your opponent gains life, but isn't that a small price to pay considering you're only putting in a one-mana investment
Also, if you want to walk your way to victory with this creatures activated ability, playing a critical mass of Dogs is the way to go anyway
Mystic Intellect Commander (1) Planeswalker (1) Creatures (19) Backdraft Hellkite Burnished Hart Clever Impersonator Cliffside Rescuer Crackling Drake Dockside Extortionist Elsha of the Infinite Gerrard, Weatherlight Hero Guttersnipe Pramikon, Sky Rampart Pristine Angel Pristine Skywise River Kelpie Scaretiller Sun Titan Talrand, Sky Summoner Thalia's Geistcaller Wall of Stolen Identity Zetalpa, Primal Dawn Instants (15) Chemister's Insight Desperate Ravings Fact or Fiction Farm // Market Fervent Denial Increasing Vengeance Leadership Vacuum Magmaquake Mandate of Peace Oona's Grace Prismatic Strands Purify the Grave Ray of Distortion Refuse // Cooperate Think Twice Sorceries (13) Deep Analysis Devil's Play Divine Reckoning Dusk // Dawn Faithless Looting Ignite the Future Increasing Devotion Mass Diminish Mystic Retrieval Rolling Temblor Runic Repetition Sevinne's Reclamation Storm Herd Enchantments (4) Burning Vengeance Ghostly Prison Jace's Sanctum Secrets of the Dead Artifacts (7) Armillary Sphere Azorius Locket Bloodthirsty Blade Commander's Sphere Empowered Autogenerator Izzet Locket Sol Ring Lands (40) Ash Barrens Azorius Chancery Boros Garrison Boros Guildgate Command Tower Evolving Wilds Exotic Orchard Highland Lake Izzet Boilerworks Izzet Guildgate Myriad Landscape Mystic Monastery Prairie Stream Stone Quarry Swiftwater Cliffs Temple of the False God Terramorphic Expanse Tranquil Cove Wind-Scarred Crag Island x8 Mountain x4 Plains x9 The Commanders Another creation using Jeskai colors doing typical Jeskai Commander things
Read More: The Best Lands Commanders In MTG 7 Mirri, Weatherlight Duelist For three mana, Mirri, Weatherlight Duelist is a Green and White 3/2 with first strike
You do want to ensure you dump at least two big things out with it however and so it will put some build constraints on your list should you wish to use it
They're both aggro decks in red and they even feature several of the same cards
