Nightbane

As many guilds (or even random groups) keep running Karazhan mostly for Badge of Justice’s sake, I will write a small guide for Nightbane, one of the 2 dragons in Karazhan.
Abilites - Ground

Bellowing Roar: Typical dragon fear; it has a 30-second cooldown. He casts this from time to time.
Cleave: Typical dragon cleave, frontal arc. Hits […]

Moroes

It’s the 2nd boss in the Karazhan 10man raid. It needs around 20 minutes to get to him since you kill Attumen the Huntsman.
Abilities

Basic Melee: 1600–2500 on plate.
Immune to Taunt and Bleed effects.
Vanish: Vanishes without dropping aggro.
Garrote: A physical DoT applied to a random player character after Vanish. Deals 1000 damage […]

Opera Event: The big bad Wolf

You’ll find The big bad wolf at the opera event in Karazhan. It’s the 4th boss in Karazhan and drops 2 badges of justice.
Abilities

Terrifying Howl: Causes nearby enemies to flee in fear for 3 sec. Cast every 25-35 seconds.
Little Red Riding Hood: Changes the target into Little Red Riding Hood. This causes the Big Bad […]

Opera Event: Romulo and Julianne

You’ll find Romulo and Julianne at the opera event in Karazhan.
Abilities
Julianne

Eternal Affection: Holy. Calls upon Holy magic to heal an ally. Heal 46250-53750, Cast Time 2 seconds.
Powerful Attraction: Shadow. Stun 6 seconds. Range 45 yards. Cast Time 1.5 seconds.
Blinding Passion: Holy. 6000 Holy damage inflicted over 4 sec (1500 initially, then 4 ticks of 750 […]

Attumen the Huntsman

Attumen the huntsman is the first boss you’ll face at the Karazhan raid. Below you’ll find his abilities, a strategy how to beat him, and a video tutorial.
Abilities of Attumen the Huntsman

Melee: 1.6k - 2.1k on tank, 8k on cloth. Disarming is recommended.
Shadow Cleave: Cleave attack for around 4k.
Intangible Presence: Casts every 30 seconds […]