Baterra

Baterra were mechanical shapeshifters created by the Great Beings that lived in the northern parts of Bara Magna.

History
After failing to end the war over the Energized Protodermis, the Great Beings created the Baterra to kill every armed combatant of the war. After the Shattering, the Baterra became stuck on Bara Magna, but continued to attack armed inhabitants. When the Skrall moved north, the Baterra killed many of the leader class Skrall, leaving only Tuma to lead the Rock Tribe.

The Baterra ambushed their enemies by shapeshifting into a tree or something else that fit into the environment. Then, when an enemy strayed by, they quickly shapeshifted into their default form, killed the victim and shapeshifted back before anyone could turn to see what had happened.

Empire of the Skrall
In Empire of the Skrall, Branar was sent on a mission by Tuma to find out if the Baterra were moving to the south or not. However, the Baterra were indeed moving to the south, and almost all his fellow skrall warriors, and most of the Vorox were killed. The Baterra let Branar escape to send a warning to the Skrall. Later, Tuma and Stronius went up North to find assistance in defeating the Baterra. They barely escaped from a group of female Skrall before they were ambushed by two Battera. The two were saved when Metus ran up and kicked their weapons away. It was then revealed that Baterra are programmed to only attack armed opponents. Metus then forced Tuma into giving him control over the Skrall, or he would unleash the Baterra upon them. This was most likely a bluff, as they would have attacked Metus as soon as he picked up the weapons to give to them.

Trivia

 * Baterra was an ancient Skrall word that meant "silent death"
 * The Great Beings designed Bohrok after the Baterra: however, Baterra are not controlled by Krana.
 * Baterra are silver in color in their default form.
 * They were created by Heremus and Angonce.
 * The Great Beings consider them a new weapon.

Appearances

 * Empire of the Skrall

Weapons and tools
They have blades. All other possible tools have not been confirmed. It is possible that, like Bohrok, they can snap their heads forward.