Xylophon

Xylophon: a reanimated skeleton, named for the sound they make as they rattle. An animated skeleton is a type of physically manifested undead often found in fantasy, horror fiction, and mythical art. Though most are human, they can also be from any creature or race found on Earth, Midgard, or Middlearth.
· Animated human skeletons have been the personification of death in Western culture since the Middle Ages.
· The Grim Reaper is often depicted as a hooded skeleton holding a scythe and occasionally an hourglass.
· Death as one of the biblical Four horsemen of the Apocalypse has been depicted as a skeleton riding a horse.
· Figurines and images of skeletons doing routine things are common in Mexico's Day of the Dead celebration where skulls symbolize life and their familiar circumstances invite levity. Undead skeletons play a more active, and less symbolic, role in modern fantasy fiction. Skeletons are creatures that have been summoned from beyond the grave. They are normally of fallen warriors on battles of long past.

Skeletons might be given 'life' by a more powerful undead or necromancer. Reanimated by dark magic powers; skeleton follow their master’s orders without questioning. They appear a mindless set of animated bones, brutal and virtually immune to a piercing attack that would only harm the flesh they lack. In many stories, legions of undead skeletons are raised as perfectly obedient and expendable foot-soldiers or guards. Since most skeletons are controlled by something else, they cannot make their own intelligent decisions, and can easily be led into ambushes, traps, or hazardous terrain.

Zombie

Zombies are dead people who are revived after their burial and compelled to do the bidding of the person who has revived them. Zombies first appeared in voodoo, or vodou, a type of black magic. In voodoo, a houngan, or sorcerer, brings dead people to live for the purpose of enslavement. The master of the zombie can then command it to implement evil tasks and perform menial labor.
In Voodoo mythology, zombies are re-animated using supernatural means and shamanistic medicines. Zombies inspire fear in everyone who sees them, and they are also thought to eat human flesh and are especially fond of brains. Zombies are most common in Haiti and Africa.
Zombies often have the appearance of a decaying person, although they may initially appear to just be a little distracted (or in a trance, or strangely attracted to your cranium…). Zombies’ brain stems are the only thing that is not dead about them, and their whole body moves with a supernatural energy and power. Zombies may be greenish in color and dressed in filthy, mouldy rags. Evil sorcerers can command armies of zombies to do things like attack villages and build dark temples. Zombies rise from their coffins, splintering the wood and bursting up through the soil. When this occurs, please be prepared to separate the zombie from its head by any means possible.