This tracks the arcane thirst of Oculeth, Thalyssra, and Valtrois, three Nightfallen you encounter during your travels in Suramar. Each offers a quest to feed the NPC 50 arcane mana. Completing these quests grant the player 50 reputation with the Nightfallen, per NPC. These quests are available every 24 hours.
This addon will help the player track when these quests reset, and notify the player of that event.
/arcanethirst to show the tracker.
Note that the timers for each NPC will be inaccurate until you turn in each quest for the first time, after installing this addon.