Errand Chronicle 21311 · Entry #4

[Boss] Giant Chief Gehaku

Black Spirit

Objective
The Black Spirit NPC Knowledge explained that you must defeat Gehaku NPC Knowledge, the head of the giants. This will deal a blow to their morale that'll prevent them from launching an attack on Keplan. Defeat Gehaku.

Interact with the Dark Portal and defeat the summoned Gehaku NPC Knowledge;
Dialogue
Black Spirit Dialogue
Have you ever heard of Chief Gehaku NPC Knowledge? He's the leader of the giants.
Chief Gehaku actually died a long time ago.
Although Gehaku is dead, his strong will and determination
has prevented him from ceasing to exist.
It's a scary thought, but in order to prevent the giants from
launching an attack on Keplan, we'll have to defeat Gehaku by force.
Black Spirit Dialogue (Alt)
The Giants can't admit that their Chief is no longer with them.
Why don't we help them see the truth?
Black Spirit Completion
Although he's already dead, the giants are probably aware of the fact that you defeated Gehaku NPC Knowledge. Hehe.
This will break their resolve to invade Keplan.
I think this should be enough.
Other Errands in This Chronicle

4 further errands share this chronicle — the same travelers, the same stretch of road.

Details
Chronicle21311
Entry4
Summary
Although he's already dead, the giants are probably aware of the fact that you defeated Gehaku NPC Knowledge. Hehe.
This will break their resolve to invade Keplan.
I think this should be enough.