Coriakin

Background
Coriakin was originally a star, charged by Aslan to rule the Duffers and guide them to wisdom because of past misdeeds, the exact nature of which was never known by humans (a fellow star, Ramandu, mentioned they were not for human beings to know).

During Caspian's journeys on The Dawn Treader, Coriakin appeared as a stereotypical wizard, complete with a beard and ornate robes. Quite unlike wizards, however, he always walked barefoot. He lived in a mansion that was reminiscent of English mansions on the island. Inside his mansion were items such as a spellbook and other odd items such as a Bearded Glass.

Governing the Duffers
To govern the Duffers, he required the use of magic, although they will be ruled by wisdom in the distant future. Because of the dim-witted stubbornness of his subjects, Coriakin cast a spell that merged each Duffer's two legs into 1 leg.. The Duffers, believing themselves to have been "uglified," snuck into his rooms and cast a spell to make themselves invisible, hiding their new appearance. The spell also affects Coriakin.

The Visit by the The Dawn Treader
The Duffers eventually grew tired of being invisible, and, when The Dawn Treader visited their island, coerced Lucy Pevensie into reading the spell that would make them visible again. The spell could only be read by a young girl, and the Duffers were too cowardly to send any of their own daughters. After perusing through a few other distracting spells, Lucy made all things visible in the magician's house (including Coriakin and Aslan himself).

Lucy soon saw the magician as a kind, wise fellow, hardly the terrifying sorcerer the Duffers made him out to be. He suggested that she try to convince the Duffers that their new appearance is nicer than their former one, which she succeeded in doing. The Duffers renamed themselves Monopods, but kept mixing it up with their old name and came to be known as Dufflepuds.

Dufflepuds are among the creatures that entered Aslan's Country after the final battle in Narnia. Presumably Coriakin's efforts at enlightening them had been successful by that time.

Powers and Talents
Coriakin was an unbelievably potent and talented magician, granting him with a vast array of magical gifts. He could remember a thousand score of any spell used for any purpose without searching his mind and cast them effortlessly. The spells he can't remember are recorded in the Magician's Book.

The following is a more specific list of his powers:

Magic
Coriakin had a natural affinity for magic (granted by and submitted to Aslan), and can use this magic to summon arcane energies to twist and shape the world around him to the extent of instant animation of his every desire in every aspect of his life. He could invoke the countless rituals and powers and evoke dryads, naiads, oreads, and all the gods to aid him and could siphon their power and add it to his own.

Moving Objects
This is a certain type of magical gift much like psychokinesis. With it, he could lift objects into the air according to his thoughts and move them without touching them, as well as cause them to travel floating, flying, or hovering as he wished.

Enchanting
Coriakin has extreme knowledge of charms, able to enchant objects or creatures to bring about any effect or result conceivable.

Concealing Method
Coriakin possessed the Book Of Concealing Method, teaching him to "ascend to the clouds astride the wind;" and how "... to pass through mountains and penetrate rocks; to float light as vapor over the seas, to become invisible at will and to change [his] shape and transfigure objects or other creatures, to fling swords and project daggers so as to decapitate a man from a distance."