Carock

Carock is boss of Maze Island, the dungeon in Zelda II: The Adventure of Link. Its appearance is that of a very tall, red-robed Wizzrobe with a face-obscuring hood, revealing only its deathly white eyes in the darkness. Both his appearance and pattern of movement are different in the Japanese version of the game.

Battle
Carock can only be damaged by with the help of the Reflect Spell. An easy to way to defeat it is to move over to one of the far corners of the room, effectively making Link face the rest of the room. Then, simply duck, and all of Carock's spells should be reflected, and Link should be less likely to end up in the line of fire.

Video
This clip was provided by lleeoo2010 at youtube pBbwqfzvUwQ&feature=channel