Fizzcrank Anti-Scourge Cannons are gnome-controlled cannons located in the Scalding Pools during the Heritage of Gnomeregan questline, fighting off Ironbound Troggs alongside Fizzcrank Airmen. Several abandoned and "dead" cannons are also found scattered around the Geyser Fields and can be interacted with to call reinforcements in the form of a gnome who arrives by parachute and lands in the cannon, reactivating it for up to 60 seconds and helping the player fight any nearby troggs.
Fizzcrank Anti-Scourge Cannon
Patch 8.2.0 (2019-06-25): Added.