Bit of a twisty one

Deep within the mountains lies an ancient shrine of bone, guarded by the Dead. Within this cathedral of death, accompanied by a choir of lost souls, sits a robed skeleton with a scythe. The twist is that this is not the Necromancer that built the tower, nor any Necromancer at all - it is a cleric or avatar of the God of Death, guarding the spirits of all who have died here since the tower was raised, They trapped in this place by the perversion of Death that the tower represents, and would quickly join the tower's army of the dead if it were not for the protection given. The avatar/cleric seeks to aid the party in destroying this blasphemous ruin and allow the natural cycle of life and death to resume in this land.