From: Vindictus
Track: True Loyalty (Zecallion Battle Theme)
Extended and in HQ.
Not originally created by me, I do not claim copyright of this Soundtrack.

Playlist:

Original Picture Link:
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Plays in the battle with Zecallion in Niflheim only.
Introduced in the Season 3 Sub-Storyline Niflheim, Hell of Fomors.
Additional titles: Lost And Forgotten, The Vengeance
Original by: Studio EIM 게임음악스튜디오
Im also leaving this here:
The rage keeps him alive. The loyalty keeps him seeking vengeance.