EO1/Yggdrasil Labyrinth

The Yggdrasil Labyrinth is a massive multi-floor dungeon that appeared near the town of Etria. The mystique of the labyrinth drew in many explorers seeking fame and fortune, though the treacherous environment and wildlife has claimed many. Your guild is one of the many guilds who have come to Etria to challenge the labyrinth, and your efforts would end up spearheading exploration efforts.

The labyrinth is separated into several five-floor strata, each one resembling a different biome and playing host to different monsters.

Emerald Grove

Main article: EO1/Yggdrasil Labyrinth/Emerald Grove

The inviting forest is the first stratum where many adventurers will make their first forays. The first floor is well-secured and serves as the base for the adventurers' initiation trial. It is far from safe, though, as the Venomfly and Ragelope serve as a quick lesson on taking it lightly.

The lower floors have been threatened by a pack of dire wolves, led by Fenrir.

Primitive Jungle

Main article: EO1/Yggdrasil Labyrinth/Primitive Jungle

The Emerald Grove gives way to the undergrowth of the Primitive Jungle, which gives rise to monsters more specialized in dealing with status ailments like sleep and poison. The environment starts to turn hostile, too, with patches of thorns that hurt explorers moving through it. This is where the Wyvern makes its nest.

The lowest floor is the territory of Cernunnos, who has been obstructing progress by killing any adventurer who ventures too close.

Azure Rainforest

Main article: EO1/Yggdrasil Labyrinth/Azure Rainforest

Green gives way to blue upon entering the third stratum. While it is not strictly underwater, the flora of this stratum more closely resembles coral. It is also host to bodies of water that impede movement but can be traversed via large buoyant flowers. Threats that emerge to battle more closely resemble sea life.

The Royalant makes her nest in B12F, and the wide open area in B15F serves as the arena for Cotrangl.

Sandy Barrens

Main article: EO1/Yggdrasil Labyrinth/Sandy Barrens

One of the most desolate strata of the labyrinth, and home to the forest folk. This stratum is full of sand currents that force explorers along certain paths in the labyrinth. The deeper areas are host to teleporters that disorient anyone who traverses it without a map ready.

It is here where the forest folk make their last stand against the explorers and Radha in general, backed by Iwaopeln, their strongest fighter.

Lost Shinjuku

Main article: EO1/Yggdrasil Labyrinth/Lost Shinjuku

Beneath the Sandy Barrens is home to the Labyrinth's closest-guarded secrets: the nature of the world before the Calamity. The familiar ward of Shinjuku has been rendered lifeless following ecological collapse, its abandoned skyscrapers covered in wild plant life. The route through Lost Shinjuku takes the party up and down between B21F to B24F and back up again to power on an elevator that finally reaches down to B25F.

Under orders from Radha, Ren and Tlachtga make their last stand to prevent the guild from venturing where they were not allowed and seeing what they should not be seeing. Following their defeat, the leave behind a Card Key that is used to open the central room in the final floor, where they find the missing Chieftain and confront the truth behind it all.

Claret Hollows

Main article: EO1/Yggdrasil Labyrinth/Claret Hollows

Hidden within the arena where the final battle took place is a door that leads below the lost city. The environment of the bonus stratum is decidedly hostile, with walls of flesh and bone, and spikes coated in deadly acid. With warp puzzles focused on undoing the player's progress and more holes than the icon cap can handle, the Claret Hollows will test the party's strength, the player's cartography skills, and above all, the player's own patience.

At the end of it all resides the heart of the labyrinth, and the final challenge for explorers looking to test their strength.