The Grimtotem Weapon

During the last Grimtotem attack, I was wounded, but not before I managed to capture a curious totem our enemies were using against us.$B$BIt seemed to be emitting raw bolts of energy during the battle, but in all my experiments, I haven't managed to figure out how it works. I'll loan the totem to you if you agree to help me test it.$B$BThe watery areas surrounding the farm are home to pesky mottled drywallow crocolisks and drywallow daggermaws. Try fighting the crocolisks near the totem.