From Zelda Wiki, the Zelda encyclopedia
Omfak is a shape-shifting, guardian creature who oversees the Shrine of Gamelon in Zelda: The Wand of Gamelon. In battle, Omfak is known to shoot projectiles and morph its likeness into that of a wolf, a fire-spitting lion, and a pair of gigantic, exaggerated lips. During one of the title's cartoon cutscenes, it claims that "whatever I see, I will devour", and demonstrates this motto by killing and eating a nearby bird. After Omfak is defeated at the hands of Zelda, the foe explodes into a flock of black birds. Omfak is the equivalent of Lupay from Link: The Faces of Evil, and also bears marginal resemblance to Glutko, both in its gluttonous behavior and significance to the plot.
During the battle, Omfak will rotate through three different forms, however, only when in the "lips" form will it be vulnerable to damage. In its wolf form, Omfak procures star-shaped lasers, and when in lion form, fireballs are its projectile of choice. Typically in Zelda: The Wand of Gamelon, only one strike of the sword is enough to dispel a boss, and Omfak is no different.
Omfak shape-shifts into a lion to roast the bird.
Omfak's enormous lips devour the roast bird.
Zelda going up against Omfak's wolf form.
Omfak's vulnerable "lips" form.
Upon defeat, Omfak explodes into a flock of black birds.