The instance is accessed from the space-time Dimensional Gap on the second floor.
Talk to Professor Bernharddali0297142 to book the instance, and Dimensional Device to enter.
Instance Info
Cooldown Quest Name: Go back to Professor Bernhard
Note: It's needed to talk to Professor Bernhard after the instance to start the instance cooldown timer.
Time Limit: 1 hour Map Name: 1@glast
Walkthrough
When party leader approaches Fenris Fenrir, dialogue will automatically begin. The character who approached Fenrir will be unable to move for a short period.
A group of red Mutant Galion monsters will appear and attack. Either kill them or let Fenrir kill them.
Fenris Fenrir will resume talking. After she's done, have party leader speak to her.
Fenrir will talk some more until she disappears. A portal to south appears, go through it.
Move to the bottom-center of the map.
It is fine to ignore the Wicked Chimeras.
About 10 minutes after starting the instance, Sarah will begin attacking the player (in a deadly fashion). Reach the next part before this happens.
At bottom-center, have party leader talk to Fenris Fenrir. Party leader will be unable to move, use skills, or consume potions, vulnerable to being attacked.
Fenrir will disappear and ask you to meet her at the top-left of the map (a red marker will show on your mini-map). This is optional.
There are now two routes you can take for this instance:
Route 1: Hunt Shard of Gigantes / idle for 5 minutes (suggested route)
Route 2: Help Fenrir
Note: It's possible for experienced players to do both routes with high enough DPS.
Route 1: Hunt Shard of Gigantes
Route 1: Farming Shard of Gigantes
Note: Next part of the instance continues after 5 minutes no matter what, so ignoring to hunt Shards of Gigantes and going AFK is a choice too.
There are six Ancient Gigantes, each on the parapet towers of Glast Heim. It will always drop a Shard of Gigantes and a chance to drop Gigantes Card.
Once Sarah is in critical condition, you have 50 seconds to kill her. Check tips sections below.
After Sarah is defeated, you get warped out of the battle area. Talk to Fenris Fenrir.
You have 5 minutes to "escape" back to the entrance of the instance. Make your way to the bottom of the map, then the bottom right, then up to the top right.
After 5 minutes, any party member that doesn't escape from the inner section of the map will be killed and killed again if resurrected.
Sarah Irine will make announcement about her "wrath burn bright within Glast Heim" when the 5 minutes has passed.
Exit the instance through the portal to the right and talk to Professor Bernhard to start the instance cooldown.
Tips
While Fenrir is Damaging Sarah
Before entering the portal to start the final battle, it is also possible to sneak up around the stairs to be out of range of damage and monsters. Your camera angle will be far enough to talk to Fenris Fenrir.
Sarah Irine is not a normal nor boss type monster. She is Medium sized and Human race.
If the user receives damage greater than 40% of their Max HP, only 40% of their MaxHP will be taken. Note: Does not work against Reflect type damage.
Item Rewards and Enchantment
After completing the instance for the first time, talk to Professor Bernhard to receive a reward. He will offer you a free accessory. You can choose between Sarah's Left Earring and Sarah's Right Earring.