Mystikos
Complete all three Rite of the Nine dungeons ("Ghosts of the Deep," "Spire of the Watcher," and "Prophecy") on Eternity mode before the next daily reset.
The Emissary of the Nine has extended their challenge to you: Complete all the dungeons in their Rite in one day.
"Engrave your claim thus: to the strongest." —The Emissary