Lullaby

Lullaby (ララバイ Rarabai 呪歌　lit. Cursed Song) is one of Zeref's evil creations and a Living Magic spell. It served as the one of the villains of the Lullaby arc.

Appearance
Lullaby has two forms: the Flute Form and the Demon Form (Original Form).

Flute Form
In flute form it can't speak or move and its size is nearly 50 centimeters in length. It is probably made of wood and it has a skull with three eyes on one end. There is an oval-like cutout in the skull's brow. On the other end there are root-like cutouts.

Demon Form
The flute can transform into a giant demon. In the full form the flute is nearly at 60–65 meters high. It has three eyes, two legs, two arms and one head. There are many cutouts in its body.

History
The flute was once just a tool for "murder by curse" at first, which means that it curses the target and causes it to die. After getting into dark Mage Zeref's hands, he further developed it into a Magical flute, called "mass-curse murder magic" that is capable of putting a death curse on everyone who hears its melody except for the Caster.

Lullaby arc.
Erigor hoped to use this to kill the Guild Masters at their meeting. As Kageyama failed to carry out the mission due to regret for his actions, Lullaby transformed into its demon form to feast on souls. However, Natsu Dragneel, Gray Fullbuster and Erza Scarlet were able to easily defeat the demon flute. It currently is in the Council’s hands.

Magic and Abilities
Sound Magic: Whoever hears Lullaby’s song (aside from the Caster) will die.

Appearances in Other Media
Lullaby appears in Fairy Tail's first official video game, Fairy Tail Portable Guild. It is one of the most powerful bosses in the game. Like most of the game's large-sized creatures Lullaby's size is greatly reduced.

Major Battles

 * Erza Scarlet, Natsu Dragneel & Gray Fullbuster vs. Lullaby

Trivia

 * The name Lullaby came from the baby's song to make them sleep
 * Master Goldmine said Lullaby is the devil from the book of Zeref.