There are 3 quests in Shal'aran Suramar (Cave at 35.0, 47.6). All of them work like daily quests. You feed NPC with 50 [currency=1155] and he gives you a buff and 50 reputation with the [faction=1859]. Can buy buff at any time, but reputation quest can be done once in 24 hours.
You can see red bar. https://i.gyazo.com/160c4be41b1f6c6f1bd3bcc352e89ac4.png
It shows how long you have to wait till the next time you can feed the npc.You can't interact with npc if they need food, so feed them if you want to complete quest or start a new one.
QuestNPCBuffQuest Video
You need to progress in Suramar storyline to get npc in Shal'aran.You can see full quest chain here: Nightfallen But Not Forgotten.
Feed Thalyssra available after Shal'Aran
Feed Valtrois available after Feeding Shal'Aran (not sure)
Feed Oculeth available after Arcane ThirstBuffs demo:
[spell=224189] https://www.youtube.com/watch?v=hLSMqaku25w
Quest
Feed Thalyssra
A World of Warcraft quest in Suramar. Facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
Thalyssra is actually a She, but otherwise good info. :)
It should be obvious but once you cure Thalyssra/Valtrois/Oculeth you will no longer get this quest.
Quest facts
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(43994))
Requirements
Read from the Blizzard quest API.
Description
<Thalyssra is shaking uncontrollably and can barely speak.>
Community notes from Wowhead · 11 comments
Top 3 shown aboveThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
The top 3 are shown in Top Comments above. Read all 11 on Wowhead.
Spell: Ward of the First ArcanistWhen you would take fatal damage, you instead create an arcane barrier, restoring health and granting immunity for 5 sec, but during that time you cannot attack, move, or cast spells. Enemies who touch the barrier suffer damage and are knocked away. Requires you to be in Suramar.
Reward details
Reputation: The Nightfallen +75
These exiled Nightborne elves suffer withdrawals after being cut off from the Nightwell. They oppose their people's alliance with the Legion and fight for some kind of redemption.
Reputation group: Legion.
Other quests in Suramar that reward The Nightfallen reputation: Answering Aggression (+250), Regroup (+250), Crackdown (+250), No Reason to Stay (+250), Trail of Echoes (+250), The Only Way Out is Through (+250).
Item facts are the current retail client’s (ItemSparse); the specialisations for a pick-one item are the ones the Blizzard quest API lists; faction and currency text is the client’s own. Lowest listed price = the US commodity auction house now.