Skull

The Skulls are a pair of weapons used by Dead Master in the OVA, Manga and anime series.

Appearance
They take the form of floating human shaped skulls that radiate a green glow from their eyes and mouths. Their size varies greatly, in the OVA they are roughly human sized, but in the anime where they appear to be as large as buildings, in the manga however, they can seemingly change their size at will.

Abilities
In the OVA, the Skulls were only seen using one method of attack: ramming. Although inelegant, their charges are fast and considerably forceful.

In the anime however, they can bond together and create a humanoid figure out of the corpses of Dead Master's minions.

Trivia

 * In the manga series, Dead always refers to them as "Skull-Chan".