Margomill

Margomill is the boss of the House of Gales in The Legend of Zelda: A Link Between Worlds, appearing as a giant horizontal stone disk with a large eyeball in the center. Unlike most bosses, Margomill has no manner of directly damaging Link; rather, it uses spinning and shots of air to try and push him into the pits surrounding the arena. By using the Tornado Rod, Link can get on top of Margomill's body and attack the defenseless eye directly. Once enough damage is dealt, Margomill throws Link off, summons a pair of extra stone disk layers underneath it, and closes its eye before continuing to spin around the room. Link needs to repeatedly attack the new layers to get ridd of them and bring Margomill back to the floor, causing its eye to open and become vulnerable. Once it is attacked enough, Margomill repeats the process, but with four extra layers. Once Link has damaged it enough further, Margomill is defeated and Link earns the Pendant of Wisdom.

In The Legend of Zelda: Tri-Force Heroes, spiked versions called Margomas appear, along with a small version of that called Mini-Margos.