Although a party of 2+ is required to create the instance, only party members that are entering the instance need to complete the pre-quests.
Some monsters cast Waterball and Frost Driver, bringing Water resistance and unfrozen armor is suggested.
Instance Cooldown Quest Name
Nidhoggur's Nest
Walkthrough
With 2 or more people in your Party, the party leader must speak with the Yggdrasil Gatekeeper at {{ #if: | {{{prefix}}} }}nyd_dun0299199{{ #if: | {{{postfix}}} }} and "Accept Admission".
After the instance is created, speak to the Yggdrasil Gatekeeper again to enter the dungeon.
Note: A window will appear showing pertinent time limits for the dungeon. If it is closed, it can be opened again with with the shortcut Alt+B.
Note 2: There is a 2.5 hour time limit for completing the quest before the instance is destroyed.
Go to the Yggdrasil Servant near the center of the main room. (213,277)
Have party leader speak to her and choose the 2nd option "What's that mean?" and keep talking to her until announcement appears.
Kill 12 monsters named "Nidhoggur's Guardian". Kill each Guardian one at a time as killing more than one at the same time can bug the counter!
At the end of the maze (199,178), you will warp to the boss room. Once the party leader steps forward Template:Monster will spawn at the center of the room.
Approximately every 3 min while fighting Nidhoggur's Shadow, the entire party will be warped to 1 of 4 side rooms. They will receive several Status Effects that last for 30 seconds and ignore all resistances/immunities. 3 Ryncho and 2 Phylla will spawn in the side room with the party, they must be defeated before the party can leave the room.
Southwest (red) room: HP-75%, Bleeding Ailment (icon does not show)