From where to get - Songflower Serenade Buff, WoW Classic - YouTube
The Chronoboon Displacer will change the way you use World Buffs in WoW Classic
I got Onyxia buff at level 10 and 1-shot mobs to level 18 before it expired. Might be the most fun I've ever had in wow. 3 hours /played. : r/classicwow
Corrupted Songflower - Quest - Classic World of Warcraft