One of the bigger side quests in the latest installment in the Zelda series involves the stamp book given to Link by his elderly friend Niko. Having appeared in Phantom Hourglass, Niko is getting up there in age, and there is wisdom in his words despite the fact that he remains a comedic little character.
During the course of the game, Niko gives Link a book with empty pages. It is up to Link to collect a stamp from each of the locations he visits. Some of the stamp book stations are out in the open, while others can only be found after obtaining a certain item or learning a certain song. After filling a certain number of pages with stamps, Link can receive different rewards from Niko. Below is a list of the prizes old Niko will give Link and the number of stamps necessary for each prize.
10 Stamps: Shield of Antiquity
A great reward to say the least, the Shield of Antiquity works much like any shield you’ll find at a store, except it can’t be eaten by Like Likes, which is great because you don’t want to be spending rupees on shields all throughout the game. Niko presents the shield to Link and tells him that it once belonged to a dear friend of his (Link from Phantom Hourglass). This is the best shield money can buy, and it only costs 10 stamps!
15 Stamps: Engineer’s Clothes
This alternate outfit isn’t as big a deal as the Shield of Antiquity, but it’s a neat little item to have in case you tire of Link’s green tunic. Those who really liked Link’s getup at the beginning of the game can now have Link wear it anytime they so choose.
20 Stamps: Great Spin Attack
Filling Niko’s book with all 20 stamps will earn Link a Sword Scroll. Link will then be able to perform the Great Spin Attack, which is an advanced and deadlier version of his default spin attack.
Article from Gamersyndrome.com