Carbuncle

Carbuncle is a Guild which appears in Fairy Tail: Priestess of the Phoenix.

Location
The guild is based in principality of Veronica, though the exact location is unknown.

History
Carbuncle are hired by Prince Kream of Veronica to abduct Eclair and obtain her half of the Phoenix Stone.

After an unsuccessful attempt by Chase to capture Eclair while she was travelling with Team Natsu, Carbuncle launch an attack on Fairy Tail's guild hall and succeed in capturing Eclair and her half of the stone.

Carbuncle Mages are present for the ritual to revive the phoenix and fight against the members of Fairy Tail as they infiltrate the city. After Dyst betrays Kream to take immortality for himself and revives the phoenix, the members of the guild are left in disarray.

Many members survive the phoenix's rampage, though the exact state of the guild is unknown.

Strength
Carbuncle possesses a substantial amount of strength which mostly comes from its top four members, who are capable of fighting some of Fairy Tail's strongest members and having the upper hand for a considerable portion of the fight.

Trivia

 * A carbuncle is a mythological creature which is said to have a jewel on its head. The term carbuncle can also refer to a kind of gemstone (usually a deep red garnet).