The Trial of Monsters

The Trial of Monsters is a side quest in Hyrule Warriors: Age of Calamity.

Overview
The Trial of Monsters is a side quest that can be unlocked after completing the Scenario, "Destroy the Yiga Clan!" in Chapter 4.

There will be three quests that can make you qualify for The Trial of the Ancients, and this is one of them. It can be found in the Gerudo Desert.

The requirements needed to complete this are 5 Ethereal Stones, 350 Bokoblin Trophies, 100 Lizalfos Trophies, 3 Wizzrobe Trophies, and 20 Moblin Trophies.

The remaining two needed to qualify for The Trial of Ancients are The Trial of the Mighty Foe and The Trial of Stones.