Lesser Demon invoking will give you black sword fragments. The greater Demon activating will provide red sword chunks. K'ril Tutsaroth: Invoking will provide you with demonic blade plans as well as OSRS gold a sword hilt piece. The Demon Butler (it is known by the item name of Alathazdrar’s Seal but the examine information says it is the demon's butler's) by invoking it can take you directly to Sergeant Damien. When you invoke again, it grants 200 curry bowls.
Sergeant Damien Invoking the command will grant the wearer camo gloves, camo boots, and dog-tags (these are not random and are not part of a costume, so are unable to be stored in a dressing room). After you have the pieces and plans you've gathered from your seals, you can use them to make the Demonic Blade. You can build the demonic sword using one of the pieces from the anvil.
The blade is the same characteristics of a dragon 2h but it can deal 250-500 damage against monsters (and Zamorak). It also has a high accuracy rating and the special capability to deal 50 poison damage for half the rate of p++. There is no way that the poison will not be inflicted. The poison still affects other monster, but is not guaranteed, and deals only 10 damage. It stuns demons and has the same special attack as D 2-h. The sword requires 70 strength to use, but no attack. The sword is great to use for training regardless of buy RuneScape gold its slow speed against demons.