=================
KING BLACK DRAGON
=================The KBD (King Black Dragon) is the easiest boss to find, any adventurer in Edgevill would know this.
Follow the list to find him.
1: Go into the Edgevill general store and look for the ladders that lead down.
2: Then, you must get past the poison spiders and pull the lever which is near you.
(WARNING: Anti-dragon shield is a MUST)Pictures -Edgevill Store:


Poison Spiders and Lever:

The man himself:

The highest he hit on me WITH the Anti-Dragon shield on was 11.
----
================
FIGHTING THE KBD
================If you are even going to attempt to fight this guy, I suggest you do the following:
1: Get 2 prayer potions and 20 of the best food you can get hold of.
2: Equip the most expensive items you can get that give HIGH strength bonus and defences.
3: Get an Anti-Dragon shield and Anti-Poison.
4: Get any other items you think may help. For example a Dragon Dagger.
You can buy the Anti-Poison and Anti-Dragon shield from the Falador stores.
Here's mine:

(Yes, I forgot the anti-poison

)
Take a sip of any strength/attack/defence potions you have.
Now activate Melee prayer and go down the ladder, pull the lever etc.
You must now Immediately release all the special attacks you have, after every 2 or 3 hits the KBD does on you, eat 1 food. Keep using this method until you slay him.
Sweet Victory:

I killed him twice with one inventory of food, I only got dragon bones though.
Goodluck! Look out for more of my guides.