The Queen Black Dragon is a fearsome beast, and killing her is a requirement for the Completionist Cape. So, here's a guide to help you out.
The Queen Black Dragon is a level 2100 monster that can only be killed Solo. She has four phases that you must fight through, and different abilities she will use.
To get there, talk to Mr Ex. He can be found at home.
Go through the dialogue and go to the second page. You'll find her option here. Click it.
You'll be teleported straight into her lair. Note. If you do not have 60 summoning, you will be told you need that before entering. You cannot enter without it!
Now you can fight her.
When she wakes up, she will begin using different abilites you must tank/dodge.
Fire BreathThroughout the fight, the QBD will spit out a wall of fire - 1 Wave on the first phase, 2 on the second, etc.
To avoid them, you can walk into the gap of the wall and take no damage.
When you have defeated her first phase, she will spit out Giant Worms until you click on the Dragonkin Artifact. This will take her to the second phase, where she spits out two waves instead of one. She will also use new abilities.
Crystal FormThe QBD will take on a crystal form, where she takes less damage from magic/range, but more from Melee.
Hardened CarapaceThe QBD will harden her skin taking less damage from melee, but more damage from magic/range.
Tortured SoulThe QBD will summon a Tortured Soul, which creates a cloud of magic. If hit, you will take a lot of damage, so dodge it, or tank it. Kill the Tortured Soul, or eventually the QBD will eat it and heal off of it.
Once you have fought through that phase, touch the next Dragonkin artifact!
Phase Three - This is where she will spit out three waves of fire, and two tortured souls. The tortured souls' clouds can be run into the tortured souls themselves, damaging them instead of you. Nothing new here, kill her!
When you damage her enough, find the next Dragonkin Artifact and touch it.
Phase Four - The QBD will spit out four souls instead of two, and will spit out four waves of Fire. KILL THE SOULS. If not, one of them will begin a spell, which will stop time.
Time StopThe QBD will summon Four Tortured souls. If they are not killed fast enough, one will create a spell, time stop.
During this, you cannot eat, move or do anything but can take full damage.
Fire BurstI called it fire burst just cause. The QBD will breathe extremely hot flames that will almost instakill you unless you dodge them. To dodge them, run to the side of the room.
Fight through this final phase and kill the QBD. Touch the last Artifact and you win!
The Enchantment is restored and you've won the battle. The QBD is asleep again!
Go down the Staircase, and use the Coffer to recieve your reward!
Enter the portal to go home.
Hope this tutorial helps! Good luck and happy hunting.