View source for Promathia Mission 4-3

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{{Mission Header
|Mission Name=The Secrets of Worship
|Expansion=Chains of Promathia
|Start=
|Description=Now that you have learned the Wyrmking's plan, you must travel to the fourth mothercrystal. Nag'molada has informed you where the stone lies. However, you will need the amulet you lent to Prishe before you are to make your way there.
|Level=50 Cap
|Item Needed=[[Coral Crest Key]]{{Rare|nc}}{{Exclusive|nc}}<br>[[Sealion Crest Key]]{{Rare|nc}}{{Exclusive|nc}}<br> or {{KeyItem}}[[Temple Knight Key]] <br> and {{KeyItem}}[[Reliquiarium Key]]
|Repeatable=
|Previous=The Savage
|Next=Slanderous Utterings
|Title=The Lost One
|Reward=Access to [[Sacrarium]] (Given at the start of the quest after interacting with the Walnut Door)
|Image=
}}

==Walkthrough== 
*Speak with Justinius at (J-6) in third floor.
*Click on the Walnut Door at (K-7) upstairs next to [[Parelbriaux]] for a cutscene.
**BEFORE HEADING TO Sacrarium, consider completing the quest [[A Hard Day's Knight]] to be able to get a [[Temple Knight Key]]; to get the Key Item, the same player needs to get both [[Coral Crest Key]] and [[Sealion Crest Key]].
*Head to the Iron Gate in the northern part of {{location|Misareaux Coast|G-4}} for a cutscene.
*This is the entrance to the [[Sacrarium]]. This area is capped at level 50.
*Traverse the [[Sacrarium]] maze until you find the [[:category:Fomors|Fomor]]. Note that the maze walls will shift with each Vana'diel [[day]]. Kill the Fomor until you get two Rare/Ex [[Coral Crest Key]]s. You can do this mission with only one [[Coral Crest Key]], but it will be necessary to have an extra person to stay behind to operate the door.
*Next kill [[Keremet]], a [[:category:Corses|Corse]] NM. There are two hallways, each lined with 6 NM [[:category:Skeletons|Skeletons]]. The Skeletons don't aggro and are weak, but if anyone attacks [[Keremet]] they will rush to aid him. Defeat all 12 [[:category:Skeletons|Skeletons]] first, then pass through one of the doors at the end of the hall (K-8).
*[[Keremet]] is at the far side of the room. Wait for the taurus to wander to one side and then pull Keremet back through one of the doors into one of the hallways where the Skeletons were. Only one person should pull Keremet while the others wait in the hallway. You have 30 minutes to kill him before the skeletons begin to repop and aggro you.
**[[Keremet]] can be [[Silence|Silenced]]. He is highly resistant to stun, sleep, and Blizzard spells.
**Like all [[:category:Corses|Corse]], [[Keremet]] can [[Charm]] members of your party with the Danse Macabre TP attack. Charmed party members MUST be [[Sleep|slept]]. This fight is pretty tough as he has a nasty AoE paralyze move and can charm multiple targets. 
**A [[Beastmaster]] makes this fight much easier; a [[Blubber Eyes]] under [[Familiar]] does a lot of damage and pets are immune to [[Keremet]]'s Charm. Two [[Blubber Eyes]] can duo [[Keremet]].
*Kill [[Keremet]] and obtain the [[Sealion Crest Key]] (EX). Give it to someone who doesn’t have either of the [[Coral Crest Key]]s.
**If you did the quest [[A Hard Day's Knight]], you can go trade [[Quelveuiat]] the 2 Keys to get the permanent Key Item [[Temple Knight Key]] to be able to open the door solo.
:*'''''Optional, but recommended''''' - Head back to [[Misareaux Coast]] and kill [[Orc]]s and [[Gigas]] to lower your [[Fomor Hate]]. Check with [[Resauchamet]] at (J/K-6) of the upper floor of [[Tavnazian Safehold]]. Lower your [[Fomor Hate]] to level 1, where [[Resauchamet]] will tell you that you have a “good head start.”
*Head to (H-7) in the [[Sacrarium]] and find a door at (H-7) with two keyholes: one LARGE and one SMALL. The first party member will trade the [[Coral Crest Key]] to the SMALL HOLE; you will hear a click. The other party member will trade the [[Sealion Crest Key]] to the large hole; the door will then open. You have a limited amount of time to trade the [[Sealion Crest Key]] after the [[Coral Crest Key]] has been traded, so make sure the key holders are both ready. (Both locks '''cannot''' be opened by a single person!) You will keep your [[Sealion Crest Key]], but your [[Coral Crest Key]] will break. If the [[Sealion Crest Key]] isn't traded quickly enough, you will have lost your opportunity to get the door open, and will have to get another [[Coral Crest Key]].
*Find and click on the Wooden Gate at (G-8) for a cutscene.
*Head back out the locked door. If you do not have another [[Coral Crest Key]], you can leave a member behind to open the door with the switch.
*There are six classrooms, three on the north side of the area of [[Sacrarium]] you are in and three on the south side. Each has a [[???]] in it. Check each [[???]] until you spawn the [[Ghost]] NM [[Old Professor Mariselle]] and his two [[Mariselle's Pupil]]s.
**[[Old Professor Mariselle]] teleports, casts [[Sleepga II]] and [[Silence]], and uses [[:category:Ghosts|Ghost]] abilities. It seems to have a fair bit of regen, so continuing to keep damage on after it teleports is important.
**Don’t use [[AoE]] abilities or you will aggro the [[:category:Fomors|Fomor]].
**The [[Mariselle's Pupil]]s are weak, but if you kill them [[Old Professor Mariselle]] will summon more. They CANNOT be slept.
*Kill [[Old Professor Mariselle]] and check the [[???]] again for the [[Reliquiarium Key]].  Any [[???]] in any of the rooms will allow you to obtain the [[Reliquiarium Key]].
*Proceed back to the locked door and open it with your second [[Coral Crest Key]] and the [[Sealion Crest Key]], using the same method as before. Alternatively, simply have someone operate the switch on the other side.
*Head back to the Wooden Gate to end the mission.

'''NOTE: If a party member has fallen during the fight with the Professor, refrain from using Tractor as it will cause the player to zone and the NM will have to be repopped before they can get their key item!'''

[[category:Missions]]
[[Category:Chains of Promathia Missions]]