The new world buff added in Phase 3 Season of Discovery, Fervor of the Temple Explorer, is granted after turning in a quest on Yojamba Isle in Stranglethorn Vale. Like Spirit of Zandalar, this buff is also given to players in Booty Bay.
Sunken Temple Level-Up Raid Loot Sunken Temple Level-Up Raid Overview
A Broken Ritual is a quest you obtain when using the Scapula of the Fallen Avatar, which drops off Avatar of Hakkar inside Sunken Temple.