Fire Cape
From Runescape Guides & Runescape Tips
The Fire cape is considered the best cape in the game. It has a unique animated lava look. It is a symbol of power and rank because of the accomplishments that one must make in order to get the cape. It is non-tradable and only can be gotten by killing the level TzTok-Jad, a level 702 and currently the strongest monster in the game, in the Fighters Cave. People may high alch the cape for 36k or low alch it for 24k, but people rarely choose to do that because of the great time and effort it takes to beat TzTok-Jad. Also, you are only allowed to carry 1 cape at a time, so you can't collect multiple capes. It provides a +11 defense boost in every category. A +1 Attack bonus in every category, and a +4 strength bonus and a +2 prayer bonus.

