Eyeroc

Eyeroc (', also potentially translated as Eyerok''') are rare enemies in  that will only appear in special circumstances, usually when a switch or a lever is pulled. They fly in a group of four, much like Green Zols in the same game, and if the four Links defeat them all they will obtain a large Force Gem. They will circle the area before flying away, and do not pose any real threat, and can be defeated in one hit each. To defeat them in one go, it's best to line the four Links in a row and strike as one.

Trivia

 * Eyeroc are very similar to Chasupa and Eyeball Monsters, as well as Patra from the original game.