[Striker Awakening] Descent of Fury

Description

I've finished preparations to meet with my past. Follow the guide and use "Vicious Mind of Concentrated Time" to summon the Echo Spirit and defeat it.

※ If you die to the summoned Echo Spirit and fail the quest, you will need to summon the boss again.
※ You can reobtain the boss scroll if you forfeit the quest and accept the quest again.
※ You must delete the "Vicious Mind of Concentrated Time" from your inventory to reaccept the quest.