by magic
ofcaurse he or she can level 60tys can heck i can and im level54
Instantly eh? Well I guess you could kill an abyssal demon for one but you must have 85 slayer though. Another option would be buying off the grand exchange.
The Sword you used to kill the demon with, the sword is good against demons.
unless you want to die...NO!
erm your supposed to kill Elvarg which is lvl 80+, close to a lesser demon which is also about the same level In melzars maze you have to kill a lesser demon to open a door for a map piece.
Some you can buy at the RC Guild when you have level 50 RC, or you can kill abyssal monsters and they drop them as random drops.
you need at least a mithril armour to prevent dark wizards to attack you. With silverlight , you can kill it by 1 shot. (silverlight is weakness to any demon , including the demon you have to kill in mezler maze when you do dragon slayer.)
you dont make it.... You have to kill absyal demons with the slayer skill. this requires 85 slayer and the drop rate is rare
in the deep wilderness against greater demon level 92
I would say you should be level 50+. You could be lower but with better food.
the best way is to have a anti dragon sheild, an abyssal whip, full dragon armor, and a little food and free inventory slots.
The pattern is always different. Go to the gypsy where you started the quest. She will tell you the code again. I suggest writing it down.