Old Glast Heim: Challenge Mode

== Overview ==
"The dimension that we've discovered this time is a variant of the time zone of the Himmelmez's attacks, a kind that's frequently seen around here, but this is a bit bizarre.
Varmundt and Heinrich do not exist there. it's very rare to see a dimension where the person itself that existed has disappeared.
And the wavelength is so powerful that it's getting bigger. The current time will be eroded by the contaminated time. Before that, we need to prevent it from getting bigger."
- Oscar Karagnus
This instance is mainly farmed for Temporal Spell, which is used to exchange for various weapons, upper headgears such as each 3rd class's Circlet of Time, enchants for those Circlets, and the Mutated White Knight & Mutated Khalitzburg Cards.
*Note: while this page is under construction to match IRO there is a very detailed KRO guide on the other wiki which is worth checking for more details but which is not yet been verified as accurate for IRO.
== Instance Info ==
=== Monsters ===
*Instance Cooldown Quest Name: Aftermath of the challenge 
*Time Limit: 1 hour, 30 min
*Map Names: 4@ghc0
== Walkthrough ==
WARNING: Before starting, please make sure your party members are all online and ready to go inside the instance. Remove any offline members or members that do not actually intend to join the instance run.
1. Go inside and party leader will select Contamination Level (difficulty). The difficulty of the instance and the amount of rewards largely depends on the level selected.
Contamination Level Information	Contamination Level Information	Contamination Level Information
Contamination Level 	Number of Clears Required 	
1 	Start 	
2 	5 	
3 	11 	
4 	18 	
5 	26 	
6 	35 	
7 	45 	
8 	60 	
9 	80 	
10 	100 	
Note: The number of clears required is regardless of Contamination Level. So it's possible to reach level 10 by just doing 100 Level 1 runs.
Note: The stats of the enemies, including the boss, of this instance depend on the Contamination Level selected at Step 1.
2. Party is going to randomly divided into the West and East rooms with each room comprising of 50 enemies. Any late party members after Contamination Level has been selected are going to be teleported to either room.
Note: It is advised to complete the next steps simultaneously to receive an additional bonus item from the NPC after the final boss.
3. Once either side has fewer than 5 monsters remaining, a portal to the other room will open, accessible through the portal from where you came from. This first portal opening starts a 30-second timer where Prime Corruption Roots spawn in the middle hallway and will be removed when the timer is finished. If both sides of the map were opened at roughly the same time, the portal to the middle hallway will open instead and will allow you to defeat Prime Corruption Roots of amount determined by the Contamination Level of the instance. These roots drop Temporal Gemstone at a high chance. Once the 30-second timer expires, the Roots will explode from Oscar's attack and will cause instant death to all players nearby. If both portals did not open after the timer expires, the party loses the opportunity to defeat the Roots.
 
Amount of Prime Corruption Root Spawns	Amount of Prime Corruption Root Spawns
Contamination Level 	Amount
1-3 	1
4-5 	1-2
6-7 	1-3
8-10 	1-4
Information above provided by Divine Pride.
4. Once the middle section is finished, talk to Oscar at the end of the hallway to warp you to the next area.
5. In the next area speak to Oscar to summon the boss. This will randomly spawn either Phantom Amdarais (PA) or Phantom Himmelmez (PH) by a certain chance determined by the Contamination Level. Once the boss is summoned, all characters including dead ones are summoned to the room. Defeat the boss to finish this part of the instance. The abilities of either boss depend on the Contamination Level as well.
Basic Boss Information	Basic Boss Information	Basic Boss Information
Contamination Level 	PA HP 	PH Spawn Chance
1 	600,000,000 	4.59%
2 	750,000,000 	4.72%
3 	900,000,000 	4.95%
4 	1,050,000,000 	5.32%
5 	1,200,000,000 	5.88%
6 	1,350,000,000 	6.76%
7 	1,500,000,000 	8.20%
8 	1,650,000,000 	10.87%
9 	1,800,000,000 	17.24%
10 	2,000,000,000 	50%
Note: for the fight your damage will be reduced to 1 if the number of living party members and the number who registered at the start are different. This means resurrecting any dead characters is a priority, all players outside the instance or offline must come inside the instance's boss area. There may be occasions due to other issues where you may need to request a player to log off to get the correct amount of party members.
Note: If all party members are dead or off screen for a short amount of time the fight will reset.
6. After defeating the boss, a treasure chest will appear that where its contents are determined by Contamination Level shown in the table below.
 
Reward Item 	Contamination Level	Contamination Level	Contamination Level	Contamination Level	Contamination Level	Contamination Level	Contamination Level	Contamination Level	Contamination Level	Contamination Level
Reward Item 	1 	2 	3 	4 	5 	6 	7 	8 	9 	10
Sealed Temporal Circlet	1-5 	1-6 	2-7 	2-8 	3-9 	3-10 	4-10 	4-10 	5-10 	5-10
Temporal Fragment 	1-15 	1-20 	1-25 	1-30 	2-30 	2-30 	3-30 	3-30 	4-30 	4-30
Temporal Gemstone 	- 	- 	1-3 	1-4 	1-4 	1-5 	2-5 	2-6 	2-6 	2-7
Temporal Spell 	- 	- 	- 	- 	1-3 	3-7 	5-11 	8-16 	11-22 	14-28
7. Talk to Oscar to receive rewards depending on how well you've finished the instance. 
 
Post-instance Sealed Temporal Circlet Rewards	Post-instance Sealed Temporal Circlet Rewards	Post-instance Sealed Temporal Circlet Rewards
Contamination Level 	PA 	PH
1 	1 	1-2
2 	1-2 	1-3
3 	1-3 	1-4
4 	1-4 	2-5
5 	2-5 	2-6
6 	2-6 	2-7
7 	2-7 	3-8
8 	3-8 	3-9
9 	3-9 	4-10
10 	3-10 	4-11
Other Bonuses 
1. Killing at least one Prime Corruption Root before it explodes: 1 more Sealed Temporal Circlet
2. Killing at least 100 phantom slaves during the boss stage: 1 more Sealed Temporal Circlet
3. Preventing to enrage boss or reset the stage: 1 more Sealed Temporal Circlet
4. When instance is done on Contamination Level 8 or higher: 1 additional Temporal Spell
Information above from Divine Pride.
== Boss' Abilties and Stage Mechanics ==
== Vending Machine ==
== Circlet of Time ==
Please check the other wiki for the full list of each class's Circlet of Time and its attributes.
== Circlet of Time Enchantment ==
Please check the other wiki for the full table of enchants.
*Note: on IRO the enchantment 'Unyielding' is known as Tenacity
== Card Trade ==
Card Trade	Card Trade
Item 	Requiement
 	
 	
== Cards ==
Category: General Information
Category: Enchantment
Category: Instances