Grisald's Reanimated Guardian

What's it called? Grisald's Reanimated Guardian (in short, GRG)

What does it do? One of the top level defensive spells, Grisald's Reanimated Guardian allows you to reanimate a corpse and turn it into an additional and creepy bodyguard: a skeleton warrior. The skeleton will protect you until it is killed (again...) or you lose mental control of it (something that tends to happen after some time. Sekiri mentions around 45 minutes at best).
As such, this spell looks extremely useful, being one more level of protection to the usual magical defenses (floating shield, trollskin, TPA...). Its main inconvenient is that the skeleton warrior sucks the experience you get (in the past, up to half of it. It is said that today, only around 10%). It is also quite a rotten fighter, and will only come to your aid when your shields are down or hits pass through them.
As to the skeleton's stength, it is variable, and dependant on the caster's skills. Per description, the warriors can be 'slightly fierce', 'fierce' and 'very fierce'. Even in the best of cases, its hitpoints won't surpass the 2000 range, so it will be good to shield it. Also, it will automatically equip (when resurrected) the weapons it has on it (which gives the possibility of depositing weapons and armour over the corpse, better then the original).

Where is it? As the Necromancer's top spell, it is only appropiate that it should lurk inside the Body Parts for the Advanced Student grimoire, at Unseen University.

What does it require? A corpse. A human one. It is destroyed in miscasts.

What skills do I need? Summoning, Binding, Animating, Healing

Has it worked? A correct output should read something like this:

You prepare to cast Grisald's Reanimated Guardian on the corpse of a xxx.
You kneel and summon life force from hidden places.
You make magical equivalents of the long-gone muscles and ligaments of the skeleton, binding them onto the bare bones.
You attempt to magically reanimate the dead bones.
You attempt to repair the worst damage to the body.
The skeleton groans, stirs and rises.
The skeleton warrior equips a military cape, a short sword scabbard, a long sword, a mail coif, a pair of metal clad boots, a mail skirt, a mail shirt and a large metal shield.
The skeleton warrior moves to defend you.
You mentally take control of the skeleton.

Notes: A 'look' at the skeleton warrior, should you be so bold, offers the following description:

A walking corpse. Bits look like they're about to fall off, or already have. It looks slightly out-of-touch with the world, and very fierce.
It is in good shape.

Help Information:

Skeleton Guard ----- Discworld spell help ----- Skeleton Guard

Grisald's Reanimated Guardian - Create a skeleton guardian.

Grisald's Reanimated Guardian is a first order defensive spell that reanimates a corpse to protect the caster.