Go find the Berni Tribesman Ariad in Khufu Desert Depths.
You must be at least LV83 to complete this quest.

Show Quest Info

Introduction

Garlandi said you need Horus' Blood. The Berni Tribe worships Horus. Their chief actually meets with Horus a few times a year and is well acquainted with the god. You should find the chief and he can lead you to Horus.

NPC Dialog

You want to speak to the chief? Unfortunately, he
was kidnapped by the cowardly, Set-worshipping
Serra Tribe a few days ago. Our forces are
dwindling, we can't rescue him ourselves, most of
us have already given up hope...
You must be at least level 83 to continue the
story.

Quest Completion

I see the determination in your eyes, young one. I
do have a rescue plan, but it will be most difficult.
Only the warrior that goes above and beyond, the
one whose will refuses to be stopped by the gods
themselves, will succeed.
You must be at least level 83 to complete this
quest.