The Jailer’s five keys:
- Revendreth: Denathrius already gave him his: check
- Bastion: Anduin got Kyrestia’s key: check
- Ardenweald: the key is probably in the Heart of the Forest: to be obtained
- Maldraxxus: “do not let the Jailer reach the sepulcher”: the key is hidden in the Sepulcher of knowledge: to be obtained
- The Arbiter IS the final key
What do you think the keys are for? Are they for the alleged secret?
What do you think the secret is?
Also, in Bellular’s QandA, in the context of the morality answer, they said the titans and Order were benevolent to those who agreed with them and we would yet see what they did to those who disagreed with them. I think they are referring to the Jailer.