This is a description taken from www.BIONICLE.com. Do not modify it.
Lehvak-Kal is the fastest and most unpredictable Bohrok-Kal. Its vacuum shield gives it two powerful modes of defense, and there is no way for a Toa Nuva to know which it will choose. Lehvak-Kal makes full use of the terrain, and can disappear into the jungle in an instant.
Lehvak-Kal’s vacuum shield can suck all the air out of a given area, causing a destructive implosion. It can then release the evacuated air in a single blast that has the power to smash through solid rock.
Pushing the lever on its back will cause its head to spring forward.