Black Demon

About
To get to Black Demons click the Monster Teleport, then click "More Monsters", then click on "Taverly Teleport". Afterwards head down south to the ladder (Has a "!" symbol on mini-map). Once in the dungeon stand in front of the pipe and then click it to go through. Once through head south until you get to chaos dwarves, then west until you come to the Black Demons.

Black Demons may seem really hard based on their level and size but are actually quite easy. They rarely hit on you and can drop some rune if you need to make a little cash. I reccomend to just fight them with a few food and maybe prayer potions for a strength bonus.