Agrith Naar

Agrith-Naar is a demon, formerly disguised as Denath, that must be killed in order to complete the Shadow of the Storm quest.

By default, he uses melee up close and fire blast at a distance, hitting up to 11. However, he will automatically switch to the opposite attack if players use prayer on him. For players trying to range or mage Agrith Naar, he also has a spell which teleports the player within melee distance of him. He reappears as Agrith-Na-Na (being made of bananas, the name fits) during the final battle of the Recipe for Disaster quest.

He can only be defeated with the use of Silverlight which then is stained with ichor, becoming Darklight. As with all demons, he is weakened by the effects of Silverlight, and whilst fighting him, the final blow must be dealt with the sword, a special advice, if the final blow is delivered to Argith-Naar with a weapon other than Silverlight, he will regain half his health, so be carefull.

He is quite strong for his level and should be attempted with caution.

History
According to Father Badden, Agrith-Naar used to inhabit its own dimension from which he could control all chaos in the world. However some ancient priests faced off against him and brought him to the mortal realm, where they encapsuled him into an immortal body, so that he would remain a forever young man but with no power at all.

Shadow Of The Storm
In the quest an evil cult wants to turn Agrith back into a demon so he could be their slave and grant them supreme power, however when the evil ritual begins, it's revealed that the cult's leader, Denath, is actually Agrith-Naar in his mortal form, and the spell was actually to return him to his dimsension where he controls chaos, as one of the evil cult's members feared.

However the hero recruits a new team formed by Evil Dave, Father Reen, Father Badden and Clay Golem and using a spell found in Agrith's Demonic Tome they bring Agrith in demonic form to the mortal world and the hero engages him in battle.

The battle eventually concludes when the hero imaples Agrith-Naar on the Silverlight sword and it becomes Darklight due to it getting stained with Agrith's tainted blood.