I don't really know why I made this guide. All the quests are pretty straight forward. But since I made the guide for Thepem and Zosilem (Which you can find here or here) I decided I might as well make this one too! 
Percolem is part of the new Tier Quest system introduced in the Stygian Abyss expansion.
Percolem can be found in Ter-Mur in the Royal City in the little market area.
To advance the Tier you must complete a specific amount of quests:
Tier 1 - No requirements.
Tier 2 - Complete 5 of Percolem's Tier 1 quests.
Tier 3 - Complete 10 of Percolem's Tier 2 quests.
All of these quests are repeatable but you must wait a certain amount of time after completing a quest before you can get it again.
The cooldowns are as follows:
Tier 1 - 30 minutes.
Tier 2 - 2 hours.
Tier 3 - 24 hours.
Tier 1
Boura, Boura
Raptorlicious
The Slith Wars
Tier 1 Rewards
Tier 2
Boura, Boura, and more Boura
Revenge of the Slith
We’ve Got an Ant Problem
Ambushing the Ambushers
Tier 2 Rewards
Tier 3
It Makes Me Sick
It’s a Mad, Mad World
The Dreamers
Tier 3 Rewards
Ter-Mur Spawn Map for Percolem Quest Creatures
Warning! It's ugly!
Note: This map is not 100% accurate. You might not be able to find the specified monster within the borders and/or you might find the specified monsters outside the borders. This map is simply a rough guideline.
If anyone sees any errors in this guide or information that may be useful please post and I will update it. I might be missing some rewards or have the information wrong. 
Happy questing!
Percolem is part of the new Tier Quest system introduced in the Stygian Abyss expansion.
Percolem can be found in Ter-Mur in the Royal City in the little market area.

To advance the Tier you must complete a specific amount of quests:
Tier 1 - No requirements.
Tier 2 - Complete 5 of Percolem's Tier 1 quests.
Tier 3 - Complete 10 of Percolem's Tier 2 quests.
All of these quests are repeatable but you must wait a certain amount of time after completing a quest before you can get it again.
The cooldowns are as follows:
Tier 1 - 30 minutes.
Tier 2 - 2 hours.
Tier 3 - 24 hours.
Tier 1
Boura, Boura
Objective: Kill 20 ruddy boura or 15 lowland boura.
Ruddy boura can mainly be found in northern Ter-Mur, but they can also be found in eastern Ter-Mur. The lowland boura can only be found in eastern Ter-Mur.

Ruddy boura can mainly be found in northern Ter-Mur, but they can also be found in eastern Ter-Mur. The lowland boura can only be found in eastern Ter-Mur.

Raptorlicious
Objective: Kill 20 raptors.
Raptors can be found in three locations in southern Ter-Mur.
They will also sometimes spawn when pulling weeds in Farmer Nash's field.

Raptors can be found in three locations in southern Ter-Mur.

They will also sometimes spawn when pulling weeds in Farmer Nash's field.
The Slith Wars
Objective: Kill 20 sliths.
Sliths can be found in northern and eastern Ter-Mur.

Sliths can be found in northern and eastern Ter-Mur.

Tier 1 Rewards
The rewards for the Tier 1 quests are: A Dusty Adventurer's Backpack which contains a book, 20 magical residue, 3 random items, 2-3 gems, and around 2000 gold.
Tier 2
Boura, Boura, and more Boura
Objective: Kill 20 high plains boura.
The high plains boura can be found in three locations in northern Ter-Mur.

The high plains boura can be found in three locations in northern Ter-Mur.

Revenge of the Slith
Objective: Kill 20 toxic sliths.
Toxic sliths can be found all over Ter-Mur.
Toxic sliths can be found all over Ter-Mur.

We’ve Got an Ant Problem
Objective: Kill 20 fire ants.
Fire ants can be found in three locations in the Abyss. They are a part of the mini-champ system and only spawn during the first level.

Fire ants can be found in three locations in the Abyss. They are a part of the mini-champ system and only spawn during the first level.


Ambushing the Ambushers
Objective: Kill 20 kepetch ambushers.
Kepetch ambushers can be found in two locations in Ter-Mur. They are hidden so you won't be able to see them as you run by. Walk slowly and listen for a hissing sound. When you hear it stop for a few moments and they will pop out to attack you. Be careful though because they are extremely deadly.
Kepetch ambushers can be found in two locations in Ter-Mur. They are hidden so you won't be able to see them as you run by. Walk slowly and listen for a hissing sound. When you hear it stop for a few moments and they will pop out to attack you. Be careful though because they are extremely deadly.

Tier 2 Rewards
The rewards for the Tier 2 quests are: A Dusty Explorer's Backpack witch contains a book, 10 enchanted essence, 4 random items, 2 gems, and around 4000 gold. You may also get 1-2 of the following: Miner gems, white pearls, brilliant ambers, parasitic plants, and/or luminescent fungis.
Tier 3
It Makes Me Sick
Objective: Kill 20 putrid undead gargoyles.
Putrid undead gargoyles can be found ???.
Does anyone know where these are?! I've tried the undead gargoyles in Medusa's Lair and the undead gargoyles in the Primeval Lich spawn but none of them are Putrid and none of them give credit!
Putrid undead gargoyles can be found ???.

Does anyone know where these are?! I've tried the undead gargoyles in Medusa's Lair and the undead gargoyles in the Primeval Lich spawn but none of them are Putrid and none of them give credit!
It’s a Mad, Mad World
Objective: Kill 20 maddening horrors.
Maddening horrors can only be found in the Abyss. They are found on the left half of the Abyss in the grassy swampland area to the east.
Maddening horrors can only be found in the Abyss. They are found on the left half of the Abyss in the grassy swampland area to the east.


The Dreamers
Objective: Kill 20 dream wraiths.
Dream wraiths can be found at the Primeval Lich champion spawn. They are one of the last creatures to spawn before the champion comes. This is a Felucca based area so PVP is enabled. There are two ways to enter you can either go through the Abyss or you can enter from Deceit level 4 in Felucca.

Dream wraiths can be found at the Primeval Lich champion spawn. They are one of the last creatures to spawn before the champion comes. This is a Felucca based area so PVP is enabled. There are two ways to enter you can either go through the Abyss or you can enter from Deceit level 4 in Felucca.
Tier 3 Rewards
The rewards for the Tier 3 quests are: A Dusty Hunter's Backpack witch contains a book, 1 relic fragment, 5 random items, and around 5000 gold. You may also get 1-2 of the following: Miner gems, white pearls, brilliant ambers, parasitic plants, and/or luminescent fungis.
Ter-Mur Spawn Map for Percolem Quest Creatures
Warning! It's ugly!

Note: This map is not 100% accurate. You might not be able to find the specified monster within the borders and/or you might find the specified monsters outside the borders. This map is simply a rough guideline.
Happy questing!
