The Rite of Passage

 is a quest in. See also Pool of Memories.

Intro
You'll either face the first challenge or talk with Humaire.

Speak with Humaire
You have to talk with Humaire. You'll find her on the west side of the map. After small talk you'll tasked with few challenges. It is possible that this will happen after the first challenge.

Challenge 1 - Agony of the Elements
There are few enemies in this challenge.: Focus obelisks first starting with Obelisk of Air. Those are weak to fire damage. After taking down the obelisks, kill the boss once its destructive aura is down.
 * Obelisk of Air
 * Obelisk of Earth
 * Obelisk of Fire
 * Obelisk of Water
 * Tyrant of Decay

Challenge 2 - Trial of the Nāga
That's a fight against several enemies:
 * 2 Flame Nāga Marauder
 * Flame Nāga Archer
 * Flame Nāga Sorcerer
 * Fire Nāga Totem
 * Poison Nāga Warrior
 * Poison Nāga Skirmisher
 * Poison Nāga Shaman
 * Poison Nāga Totem

You'll want to focus totems first. Nagas use them to summon additional enemies - drake s and bog ooze s. Then Poison Nāga Shaman, Flame Nāga Archer, Poison Nāga Skirmisher followed by Flame Nāga Sorcerer and then the rest. You'll want to kill excessive adds through the fight if your team can't take some additional damage.

Challenge 3 - Memories of a Mad Man
To unlock the third challenge, you have to offer an artifact - Bloodied Ceremonial Obsidian Knife - at Pool of Memories. Then you can start Memories of a Mad Man.

You'll fight several enemies again: You'll want to focus Maerwald first. He's a caster and will inflict a lot of damage but also he's also fragile so will go down fast. If you have a tough party members reflected by Soul Mirror s, then leave them as last to kill (until their damage output is enormous). After Maerwald is dead, focus any remaining casters and then go for other party members and Nightmare Shade s.
 * Maerwald
 * 2 Nightmare Shade
 * At least 1 Soul Mirror, whose reflect your current party

Challenge 4 - The Bloodletting
Your enemy is Pipiltin's party: Pipiltin does little to nothing so any melee character can handle him through the fight. Remaining members of your party should take out Mercenary Rogue and Mercenary Monk. There's high chance that Mercenary Barbarian will die from your cleave. If not, take him out next. Finish the fight with Mercenary Fighter and Pipiltin.
 * Mercenary Fighter
 * Mercenary Monk
 * Mercenary Barbarian
 * Mercenary Rogue
 * Pipiltin

After completing the fight, you are given the choice of how to deal with the lingering soul energy:
 * Return it to the Crucible and the wildlife of Kazuwari: Gain the Galawain's Gift talent (+2 Accuracy against Beasts).
 * Channel it into Muātu, empowering him: Improve the active ability of Muātu's Head (speculation).
 * Absorb it for yourself: Gain a single Culmination Stone.
 * Send it back to the Wheel: No immediate gain, but might contribute to the "good" ending.
 * The Watcher attempt to return the souls to the Wheel, but is unable to do so. It seems something blocks the way to the Beyond.