Kholdstare

Kholdstare (シュアイズ, Shuaizu) is the boss of the Ice Palace, the fifth dungeon of the Dark World in A Link to the Past. He begins as a pink puffy eye encased in a block of ice. Link must use the Fire Rod or Bombos Medallion to break him out, at which point he splits into three identical parts that can be hit with the Fire Rod or with the Sword. Occasionally, ice chunks will fall down from the ceiling, breaking up into multiple pieces and dropping magic power when the Magic Bar is empty. They will damage Link if they hit him. Upon defeating Kholdstare, Link receives another Heart Container and the crystal containing the fifth imprisoned maiden.

Kholdstare (in its original frozen form) bears a striking resemblance to Frostare from Four Swords Adventures, in its suffix and physicality.

Trivia

 * Kholdstare may be derived from the words "cold" and "stare" due to its relation to ice and its only eye