Gather an Underspore Frond and return it to T'shu at Sporeggar in Zangarmarsh.
While we are a peaceful people, we are at war with the spore giants, whether we like it or not. And there is a saying amongst us that all is fair in mushrooms and war!
One of the leaders of the spore giants, Hungerfen, has been tending a very special plant, known as the Underspore, to perfection for millennia. It would break his spirit if something were to happen to that plant.
Travel to the Underbog in Coilfang Reservoir and steal a frond off of it for us. Trust me, he'll notice.