Crimson Aegis

The Crimson Aegis is a magical artefact that absorbs any attacks that are magical in nature and severely weakens magical being and entities or beings who are highly attuned to magic.
==Description==
An ornate shield that is made mainly of forged steel with gold trimmings, designed in a the shape of a kite. In the middle of the shield is a large red gemstone. The red gemstone is a Darkstone, a magical crystal with the special property of absorbing magic. Due to its properties, the artefact is extremely capable of combating mages and magical beings. It is capable of nullifying all magical attacks directed at the wielder of the shield as well as weakening any mage or magical being that strays too close to the wielder.
The Darkstone embedded in the shield would also affect the user, draining his magical energy and severely weakening him. Since Darkstone has no effect on people who possess no magical talent, it can only be wielded by somebody with no magical disposition.
(Need to give somebody this artefact, preferably a mage killer)