How to Get Songflower Serenade Buff
Songflower Serenade +15 all stats, +5% Spell/Melee/Ranged Crit – 60 min
How to get:
Cleanse a Corrupted Songflower and then loot a Cleansed Songflower in Felwood to receive the buff.
To cleanse a Corrupted Songflower, you must complete the quest Cleansing Felwood which then unlocks a few new quests. Some of these quests will only be available depending on which profession you have; however, there is also a quest for those with no profession (Salve via Hunting, Salve via Mining, Salve via Gathering, Salve via Skinning, and Salve via Disenchanting).
Each of the “Salve via X” quests rewards you with Cenarion Plant Salve, which is needed to cleanse a Corrupted Songflower (or any of the other corrupted plants in Felwood).
Once a Corrupted Songflower has been cleansed, it will stay cleansed for the next 2 hours; however the plant can only be looted once every 25 minutes.
Felwood Corrupted Songflower Locations (Roughly):