White Iron Greatsword is a 3★ weapon in Genshin Impact. It is a Claymore-type weapon.
White Iron Greatsword was released on September 28, 2020. They were introduced alongside Favonius Greatsword, Prototype Amber, Skyrider Sword, Emerald Orb, Raven Bow, The Bell, Messenger, The Widsith, Old Merc's Pal, Fillet Blade, Traveler's Handy Sword, Sword of Descension, Eye of Perception, Rust, Ferrous Shadow, Favonius Sword, Serpent Spine, White Tassel, Amos' Bow, Thrilling Tales of Dragon Slayers, Skyward Spine, Beginner's Protector, Sacrificial Fragments, Dark Iron Sword, Skyward Atlas, Aquila Favonia, Whiteblind, Halberd, Waster Greatsword, The Black Sword, Primordial Jade Winged-Spear, Magic Guide, Sacrificial Greatsword, Skyward Harp, Blackcliff Pole, Deathmatch, Royal Grimoire, The Stringless, Favonius Codex, The Viridescent Hunt, Prototype Starglitter, Lion's Roar, The Flute, Cool Steel, Sacrificial Sword, Seasoned Hunter's Bow, Prototype Crescent, Favonius Warbow, Dragon's Bane, Prototype Archaic, Otherworldly Story, Silver Sword, Hunter's Bow, Royal Longsword, Crescent Pike, Debate Club, Prototype Rancour, Dull Blade, Iron Point, Skyward Pride, Wolf's Gravestone, Apprentice's Notes, Pocket Grimoire, Slingshot, Twin Nephrite, Favonius Lance, Skyward Blade, Iron Sting, Lost Prayer to the Sacred Winds, Sharpshooter's Oath, Harbinger of Dawn, Rainslasher, Royal Greatsword, Royal Bow, Recurve Bow, Skyrider Greatsword, Solar Pearl, Mappa Mare, Bloodtainted Greatsword, Sacrificial Bow, Black Tassel, Compound Bow, suggesting they were part of the same content update. White Iron Greatsword has been part of Genshin Impact since near its launch.