He is the final cultist to be fought. He uses melee to attack, using the Slaughter ability when he reaches 50% adrenaline. Once dead, the player can obtain his swords. If the swords are lost at any point, another may be claimed from Xenia after the quest. If the player tries to spare Reese after the fight, he drinks poison and commits suicide, completing the ritual and opening the catacombs dungeon below the church.
He cannot follow the player past the tomb door, so it is easy to escape him if in danger. This also causes him to stop being aggressive and only attack the player in retaliation.
He is dominating, using threats to get his way. His fanaticism and dedication to his goal stretch to sacrificing himself to achieve his aims, committing suicide to unlock Dragith Nurn's power. It was believed that he would have expanded beyond Lumbridge in his attempts to appease Zamorak, had he survived.