Merge

Merging is an ability of link that is so far exclusive to a link between worlds. It refers to touching a wall and turning into a painting. While link is a painting, he can only move sideways, so it is one-dimensional. This ability of link is used to solve many puzzles throughout the game and is even the method to defeat some of the bosses in the game, including the final boss, Ganon.

Link gets this ability after his first battle with Yuga. Before he even sets off to Hyrule castle, Ravio gives him his bracelet as a payment of his rent, saying that it is an antique and that he doesn't know what it does. After beating Yuga for the first time in Hyrule castle, he is turned into a painting by his foe and left there to rot. However, bracelet saves him by turning him back to normal. Subsequently, Link gets the ability to merge into a wall and pop back out at will.