Knight Mark

Knight Marks are items from The Legend of Zelda: Four Swords Adventures. These circular platforms, seemingly made of colored stone, hold the four Jewels that guard the Realm of the Heavens. When the Jewels became corrupt, the marks turned into Dark World portals, pulling in the Hylian Knights that guarded them. After Link defeats the corrupted Knights, the Jewel breaks free from the mark and the mark dissolves.