The Howling Pod is an unusual plant with a pressurized core. Smashing open the shell produces a loud noise similar to an animal cry. This sound can be used to lure large animals.
Avatar: The Game[]
In the NDS Game, Nok was granted influence over Au Tsum by Eywa. Whenever he smashed such a plant, the hammerhead would charge to his side and smash any obstacles or enemies in his way. The only weapon Nok had that was heavy enough to damage a pod was the maul.
Source[]
- James Cameron's Avatar: The Game (Nintendo DS) - Ingame Pandorapedia