As weve said several times, the ability to gain lore passively is a strong pull for players to include location cards in their deck, and they will undoubtedly prioritize locations with passive lore and great abilities over those with just abilities
Big Boa Constrictor Caustic Bronco Crypt Cobra Desiccated Naga Enduring Tenacity Erebos's Emissary Gravebreaker Lamia Hagra Constrictor Hooded Blightfang Orochi Soul-Reaver Persistent Constrictor Pharika's Chosen Python Rottenmouth Viper Rotting Fensnake Scathing Shadelock Serpent Assassin Serpent Warrior Sidisi, Regent of the Mire Sidisi, Undead Vizier Sivriss, Nightmare Speaker Skeletal Snake Soulcoil Viper South Wind Avatar Thieving Amalgam Ukud Cobra Wall of Vipers Yuan-Ti Fang-Blade Zagoth Mamba Zodiac Snake Zombie Boa
They come up nearly every turn of every game
Having the best ultimate wouldn't mean much if the other abilities are not enough to make the card playable
When Innistrad and company rotated out with the introduction of Theros , the deck died
You can't evolve a Pokmon on your first turn