Karoma < The Wolf Spirit >
Karoma is one of two new Spirit Beasts introduced in Cataclysm — the other being Ghostcrawler. His model is that of a spectral wolf — exactly the same as the legendary, and no longer tamable, Grimtotem Spirit Guide.
Since the ghost wolf was perhaps one of the rarest and most treasured hunter pets… ever… I think Blizzard added Karoma to appease the masses. Rather than limit proud ghost wolf owners to the select few who managed the difficult tame before the hotifx, Blizzard thought it would be neat if every hunter could have one.