Only elder pyre logs can be used to cremate tortured souls. To burn the Tortured soul, first place the pyre logs on a funeral pyre, followed by the soul, then ignite the pyre. This requires 95 Firemaking and will grant the player 550 Firemaking experience and 126 Prayer experience. This experience is increased by 50% if wearing Morytania legs 3 or Morytania legs 4.