[KMS] [1.2.139] Akyrum, Aran & Evan skill changes

So do Dark Timer, Zeno, and Deo have to do with Silent Crusade and Akyrum?

Crosshunter*
Basically you need to do the Crosshunter quests (Which yes, involve those bosses you listed) to enter the past portal, to get to Akyrum.