Fossilized Gun

 is a gun that fires a stream of oil. Reloading causes the skull to spit fire, which can ignite the oil.

Tips

 * If the player is immune to fire goop, a useful tactic when entering rooms is to move just close enough to the door to open it, then fire a spray of oil through the door and ignite that, then enter the room. This provides an instant ignition source when attacking the rest of the room.
 * Even without immunity to fire, it is possible to survive indefinitely in a flaming area by dodge-rolling continuously.
 * By clicking once and quickly reloading, it is possible to not consume any ammo.
 * This weapon is basically a forest fire starting kit, so it's important to be careful.

Trivia

 * This gun's mechanics and appearance are a reference to the conceit that petroleum comes from dead dinosaurs, as well as to fire-breathing dragons.