Korok Seed

Korok Seeds are items in.

Location and Uses
Korok Seeds are given by Koroks when they are found throughout Hyrule. They possess a distinct smell. When Link receives his first Seed, he is asked to return it to the Korok Hestu. Korok Seeds are actually the beads used in Hestu's Maracas. When first found, Hestu asks Link to retrieve his Maracas from a group of Bokoblins nearby. After Link returns them, Hestu realizes the Seeds were taken by the other Koroks as part of a prank.

In exchange for Korok Seeds, Hestu will add one slot to Link's Weapon, Bow, or Shield stashes. Link can fully upgrade his inventory with only 441 Korok Seeds. If all 900 Seeds are returned to Hestu, he will reward Link with a "gift of friendship."

Trivia

 * Hidemaro Fujibayashi, director of Breath of the Wild, confirmed that Korok Seeds are in fact Korok feces.