Spoiler warning: Plot or ending details follow.
- "You got the Life Tree Seedling! It is a very young form of a legendary tree whose fruit is said to cure any illness."
- — In-game description
The Life Tree Seedling is an item from Skyward Sword. Link finds it in Lanayru Gorge, and must take it to the Sealed Grounds and plant it in the past, because the tree will not grow anywhere in the Lanayru Province. When Link returns to the present, the tree is fully grown, and he must take its fruit back to Lanayru to heal him, so that Link can learn his part of "Song of the Hero".
Spoiler warning: Spoilers end here.