To the World Tree

Sword Art Online — Episode 18: "To the World Tree"

Ep 1 The World of Swords Ep 2 Beater Ep 3 Red Nosed Reindeer Ep 4 The Black Swordsman Ep 5 A Crime Within the Walls Ep 6 Illusionary Avenger Ep 7 The Temperature of the Heart Ep 8 The Sword Dance of White and Black Ep 9 The Blue-Eyed Demon Ep 10 Crimson Killing Intent Ep 11 The Girl of Morning Dew Ep 12 Yui's Heart Ep 13 Edge of Hell's Abyss Ep 14 The End of the World Ep 15 Return Ep 16 Land of the Fairies Ep 17 Captive Queen Ep 18 To the World Tree Ep 19 The Lugru Corridor Ep 20 General of the Blazing Flame Ep 21 The Truth of ALfheim Ep 22 Grand Quest Ep 23 Bonds Ep 24 Gilded Hero Ep 25 The World Seed