Its a Pokmon throwback
(You cant use more than 1 GX attack in a game.)
As long as you have the city's blessing, they also have vigilance
Aberrant Abomination of Gudul Academy Raider Acquisition Octopus Aerial Extortionist Angler's Shield Ant-Man, Reformed Rogue Ascendant Spirit Assassin Gauntlet Barbed Servitor Basim Ibn Ishaq Battle Angels of Tyr Bearer of Overwhelming Truths Beast, Erudite Aerialist Belligerent Guest Bello, Bard of the Brambles Bident of Thassa Biorganic Carapace Black Panther, Hope Enduring Black Widow, Deadly Hunter Blitzball Stadium Blurry Beeble Bred for the Hunt Broodbirth Viper Buster Sword Captain Howler, Sea Scourge Catlike Curiosity Ceremonial Knife Coastal Piracy Combat Research Creepy Crawler (playtest) Curiosity Crafter Curious Altisaur Curious Inquiry Curious Obsession Cyclonus, the Saboteur Daring Saboteur Darkblade Agent Deadeye Brawler Deepfathom Skulker Dictation Quillograph Dimir Cutpurse Domesticated Watercourse (playtest) Driven // Despair Driven // Despair Edric, Spymaster of Trest Ellivere of the Wild Court Enduring Curiosity Exsanguinator Cavalry Ezio, Blade of Vengeance Faerie Aerie Family's Favor Fathom Feeder Firkraag, Cunning Instigator Flitterwing Nuisance Garza Zol, Plague Queen Gateway Sneak Gitaxian Mindstinger Gix, Yawgmoth Praetor Gix, Yawgmoth Praetor Glissa Sunslayer Goben, Gene-Splice Savant Goggles of Night Gorbag of Minas Morgul Herd Heirloom Hired Heist Hystrodon Illvoi Infiltrator Ingenious Infiltrator Inquisitor Eisenhorn Ivora, Insatiable Heir Iymrith, Desert Doom
