<The finger-like branches of one of Nordu's burning limbs part, revealing an untouched, glimmering seed.>
This is the Heart of the Forest. The seed of life.
Take this to your Arch Druid at Aessina's Grove - Hamuul Runetotem will know how to invoke its power. I promise you, the wilderness spirit will be silent no longer. New life will bloom from the ashes of old.
This is the key, <name>! With the seedlings you collected for me earlier, the animals you've saved from around Hyjal, and the Heart of the Forest you've just discovered, we can rejuvenate this land right from under the feet of Twilight's Hammer. Imagine their astonishment to see their work undone, as life triumphs over chaos...