Liars of Spirit

Moonkin:
"The warrior statue with dual axes has a voice full of lies. He seeks darkness at any cost." -> lying because it's swords and not axes

Archer:
"The statue of the tiger has streaks of fool's gold in his stone, do not be fooled." -> lying because it's a lion and not a tiger

Warrior:
"Be cautious of the word of the titanium archer, she has only her feet to guide her." -> lying because it's made of osmenite

Lion:
"Do not trust the statue with three blue orbs. His lie will be clear." -> truth

After you select the lion to be telling the truth, "Pahi'rys" will spawn. Killing him gives you the fierce key you need to open the chest.

If anybody is confused like I was, you pick up Myrrit and place him on the pressure plate before you can select the Lion as the truth teller.

You have to put Myrrit on the pressure plate and have him wait at the location which will illuminate statues, then go to the Lion statue and choose it. This will spawn a spirit. Kill and it and get the key to open Titan Chest.