Unknown High-Tier Mission Battlefields (Deeds)

[Sirmarki]

Platform: Windows
ISP: VM
Type of Internet Connection: Cable
Internet Connection Speed:
Date & Time: Always
Frequency: Always
Character Name: Sirmarki
Race:
World: Asura
Main Job:
Support Job:
Area and Coordinates: All
Party or Solo:
NPC Name:
Monster Name:
Steps:
1.

The Text within the Record of Eminence (Deeds) mission under Other > Monthly Objectives states the battle as "Trial by (Element) battle", so the actual fight is not known.

EDIT: Apparently it is any Avatar fight? Thought it usually states a specific one?