EX All Enemies Welcome
The quest is located at the icon of Battle-Tested Guardian, south of the Great Plateau. This quest is unlocked after purchasing the DLC [Pulse Of The Ancients], completing all Royal lab quests up to The Battle-Tested Guardian, and defeating the Battle-Tested Guardian in EX Alert: Forgotten Temple
"The researchers who are studying the Battle-Tested Guardian require field reports complete with combat data. Bring back loot from powerful enemies along with the combat report."
"The powerful-enemy loot and combat data helped the researchers advance their work. They unlocked more power from the Battle-Tested Guardian, which learned a new skill "
- Battle-Tested Guardian: Bonus Combo