Incendosaurs? Whateverosaur is More Like It Hansel Heavyhands wants you to kill 20 Incendosaurs
You will find Incendosaurs occupying the lava pools inside the Slag Pit. The Slag Pit can be found in the Cauldron of the Searing Gorge.
Return to Hansel Heavyhands in the Searing Gorge when you have killed enough Incendosaurs.