The environmental factors and changes of Quel'Thalas and the surrounding regions has had a profound impact on the local flora, including even the humble Peacebloom. It is still a staple of local crafting and is utilized in a wide variety of recipes, and a recent strain that has adapted to those changes has been dubbed Tranquility Bloom. While the power of the void has been present on Azeroth since time immemorial, recent events have caused it to surge. It has managed to seep into the world, which has had adverse affects on the local ecology. In some cases, the unstable energies of the void have caused these herbs to be sent across the Twisting Nether to parts unknown. In this case, you happened to find this specimen in the Voidstorm.