The secret +5 bonus to theft is RS gold offered by this dagger. If you take on an opponent with the dagger and are 35 thieving you will be able get away with it. The seal is destroyed once you've obtained the item and defeated Zamorak. However, if Azzanadra’s Seal is available, an imp could grant you a brand new seal if your dagger has been lost.
You'll get black sword shreds when you invoke an insignificant Demon. More Demon invoking will grant red sword chunks. K'ril Tutsaroth: Invoking it will provide you with demonic blade plans along with a sword hilt piece. The Demon Butler (it is known by the item name that is Alathazdrar's Seal but the examine information states cheap OSRS gold it's the demon butler’s) When you invoke it, it will take you to Sergeant Damien. Once you've completed this, invoking again will give you 200 bowls of noted curry.