Forbidden sword

The Chaos Sword is an extremely rare drop from Phantom Chaos dragons. So rare, 1/99,999,999,999,999,999,999,999 chance. It is the best sword in the game, and is so rare some people question its existence. The highest recorded hit with it displays a white hit splat with 99,999 in red written on it, which means maybe it hits more than the maximum hit on RuneScape. It has 2 special attacks,

Chaos forbidden, Heals your lifepoints back up to full, boosts all your stats to 99 and if your opponent has a familiar, brings it to your side.

X Chaos, Instantly kills your opponent.

What special attack it uses is completely random. It was released with runescape classic but no-one ever saw it because the phantom dragons were in a secret room, which no-one knew about. Until recently, even Jagex didn't know Mod MMG had progammed it in. But last month Elfinocks noclipped in there, and suprisngly got it as a drop. Sadly he got banned shortly after. So no-one in runescape has it. It requires 99 Attack to wield.