Archimedes

Archimedes is Merlin's personal Familiar, a type of magical spirit that bonds with a high-tier mystic and acts as their messenger and companion - as such Archimedes is often found within Merlin's castle as well as traveling across space and time to perform tasks or deliver news on behalf of Merlin or his "champions of magic".

Abilities

 * Immortality (Familiars are immortal spirits who live in the Ethereal Plane, they can interact with the physical realms for as long as the mystic they have bonded with remain alive, should said mystic perish the Familiar will be forced back into the Ethereal Plane and be unable to gain a physical form.)
 * Shape-Shifting (Familiars are talented shape-shifters, Archimedes can take the form of a griffin, a lion, an owl, a dragon, a human or any combination of the four - he can also alter his size from that of a mid-size bird to a mid-scale dragon)
 * Telepathy (since language and words change constantly most beings of the higher and lower-realms have developed minor telepathic powers, allowing for them to speak directly into the minds of others and thus negate language-barriers or miscommunication : they can not read thoughts beyond the immediate "replies" of those they communicate with.)
 * Mystic Affinity (being spirits of magic Familiars are naturally capable of sensing mana and other forms of magical energy, this allows them to track magical beings and places, sense hidden mystics and even detect other spirits, deities or demons.)
 * Spell-Casting (Tier II) (as magical spirits most Familiars can cast spells, Archimedes is slightly more skilled at this than most Familiars due to being bonded with Merlin - allowing the use of magical skills up to the level of Tier II (a "skilled magician") )
 * Mystic Flight (Archimedes can mimic the flight of a winged animal or levitate when in non-winged forms, due to being mystical in nature this "flight" can also activate in space or alien environments, providing similar protection from such hostile environments.)
 * Dimensional Travel (in order to perform their tasks Familiars are capable of traveling across space and time, entering Hyperspace, Subspace, the Macrocosm, the Microcosm or even alternate realities and realms disconnected from normal space/time.)