Warped bats count as bats for the Slayer task set by Turael, Spria, Mazchna or Achtryn. Killing three warped bats is one of the Lumbridge and Draynor Tasks. The best way to make money by warped bats is to kill them and collect batwing, which they occasionally drop. Players can deposit these at the bank chest located in the Combat Academy in Lumbridge and sell via the Grand Exchange for money.