: Yui explains that Urðr is more than a simple NPC; she is connected to the Cardinal System's language engine , making her a sophisticated AI capable of complex interactions.
Upon entering Jötunheimr, the group witnesses other players helping humanoid giants massacre Tonkii's kin. A giant NPC, the , appears and explains the situation: Sword Art Online II Episode 15
: If Tonkii's kin are wiped out, Urðr will lose her power, allowing Thrym to invade ALO. : Yui explains that Urðr is more than
Realizing that many other players are now hunting for the sword, Kirito assembles a seven-person party to claim it first. The group includes: (Spriggan) Asuna (Undine) Leafa (Sylph) Silica (Cait Sith) Lisbeth (Leprechaun) Klein (Salamander) Realizing that many other players are now hunting
: Thrym, the King of the Frost Giants, threw Excalibur into Urðr's Spring, severing the World Tree's connection to Jötunheimr and turning it into a wasteland.
, titled " The Queen of the Lake ," marks the beginning of the Calibur arc . This episode transitions the series from the dark, high-stakes Gun Gale Online (GGO) arc into a lighter, fantasy-focused adventure within ALfheim Online (ALO) . Plot Overview