The Black Dog

The Black Dog is a (are) boss from AvV: Legendary Beasts.

Morport
The Black Dog is first spotted within Morport. The first time you fight it, you cannot damage it, and it very easily defeats all of the angels. After you're healed at Mistique, you are to enter Morport again, to continue your quest, but the Black Dog will be randomly roaming the area, and if it spots the leading angel, it will engage in battle. If you can escape from its range long enough, you can leave the area to visit another part of Morport.

City of Ghosts
The Black Dog is found yet again within the City of Ghosts. It is more stronger here, but will no longer haunt Morport. After collecting Excellite, you can face off against the Black Dog. After being killed, it will give Madili the Haunted Collar as an item.

Violetwitch
The Black Dog makes another appearance in Violetwitch, where it's terrorizing the townsfolk. The children are afraid to go to asleep, and afraid to stay up. No one can leave their house. You're needed to upgrade your Excellite to fight it again, however, and to do that, you're to get to Old Man Bork, but he's closed his door, and literally threw away the key. The Black Dog has taken the key to it's hideout, and it's up to you to follow the Black Dog at a safe distance. If it's spotted you from being too close, it's howl at you and chase you back to the town. The closer you are to the town's back entrance, the easier it will be to escape. The Black Dog will occasionally turn around, or stop. After obtaining the key, the Black Dog will run you out of it's hideout, to the town. If you die whilst attempting to return, it will steal the key back, and force you to try again.

Shade Keep
In the Shade Keep, the Black Dog is now several mini-bosses. The first is on the castle bridge, the second is in the foyer, the third in the Asldin Hall, and the last on the balcony.

First Battle (And Roaming)
As stated before, the Black Dog is invulnerable the first fight and while it's roaming. It is very fast and powerful, dealing 9999 damage with every attack in the first fight, but then will go down to 531 max damage as it's roaming.

Attacks

 * Bite
 * Howl
 * Claw
 * Dash

Attacks (City of Ghosts)

 * Bite
 * Howl
 * Claw
 * Dash
 * Flaming Rain
 * Flaming Fissure
 * Fearful Glance

Violetwitch

 * Crunch
 * Howl
 * Claw
 * Dash
 * Flaming Rain
 * Erupting Fissure
 * Fearful Glance
 * Flaming Dash

Shade Keep

 * Crunch
 * Howl of the Night
 * Crazy Claw
 * Igniting Rain
 * Explosive Fissure
 * Fearful Glance
 * Dash of Hell