In this guide, I will share with you how to unlock 3 hidden islands in Enkanomiya and get 3 secret achievements – Extensive and Meticulous, Unmatched throughout Tokyo, the Eel in winter sought.
This is related to the hidden world quest chain, Erebos’ secret. The sub-quests are Yachimatahiko’s Trial, Yachimatahime’s trial, Kunado’s Trial, and the three great Martial trials.
Activating the hidden world quest – Erebos’ Secret
Teleport to the Serpent’s Heart northwest waypoint and head east.
Make sure Enkanomiya is at Evernight so that you can see the ghost NPC.
3 hidden islands will appear after you talked to him.
Teleport to the Narrows waypoint and head northeast.
Glide into the blue bubble and you will get lifted and absorbed into the black hole.
Unlock the waypoint and talk to Uda.
Head south towards the ruin.
Climb up the pillar on the right side after you enter.
Hit the statue once.
Glide towards the south to collect the flame.
Head east and interact with the mechanism to change from Evernight to Whitenight.
Jump down the platform and head east to collect the flame.
Head west and hit the statue once to lower the gates.
Go back up and climb up to the highest platform.
Jump from one glowing pillar to another and get the flame.
Head east and interact with the mechanism to change from whitenight to Evernight.
Hit the statue that appears in the room where we just lowered the gate earlier to move the wall.
Collect the last flame, and talk to Uda to complete the quest.
You will receive the achievement – “Extensive and Meticulous”.
Teleport to the Serpent’s Heart waypoint and head northeast.
Glide into the blue bubble and ascend towards the black hole.
When you reached the remote island, talk to Daimon to unlock the entrance.
Follow the route and head to the ruin with 4 statues.
Light up 4 torches with pyro attacks and defeat all the enemies.
Touch the flames on all 4 of the statues to complete the quest.
You will get the achievement – “Unmatched throughout Tokyo” after completing the quest.
Teleport to Evernight Temple north waypoint and head north.
Glide into the bubble and slowly ascend toward the black hole.
When you reached the remote island, talk to Eki to remove the barrier on the gate.
Collect all the flamed according to the pins marked on the minimap.
After the collecting, all 4 of them, talk to Eki to complete the quest.
The Three Great Martial Trials
After completing all 3 challenges, teleport to Serpent’s heart northwest waypoint and head east.
Talk to Eboshi to complete the quest and you will receive primogems reward.