Trial of Thunder

The exact combat, setup, Arcana, and story requirements for unlocking Trial of Thunder.

Requirements

Defeat Headmistress Hecate at least once.
Requires one of Trial of Origin, Trial of Salt, Trial of Humility for completed Chaos Trials.
Unlock all of these weapons: Umbral Flames.
Requires Cloud Bangle obtained.
Requires all of these story events: accept Zeus's first boon.
Requires one of these story events: accept Hera's first boon.
Reach at least 3 Grasp capacity.
Requires The Sorceress revealed.
Requires Eternity revealed.
Requires The Moon revealed.
Requires Persistence revealed.
Requires The Unseen revealed.
Requires Death revealed.
Requires The Centaur revealed.