Shellsnapper

The Shellsnapper is a machine in North America. It is a large combat machine, notable for its natural camouflage. A large combat machine equipped with a shell that absorbs attacks, converting and storing the energy to power devastating attacks.

Utility

This machine guards the shores and swamps of North America. It can dig itself in and lie dormant for weeks, during which its impenetrable shell can become covered by the surrounding foliage. Despite this, it is capable of readying itself for battle in moments, effectively ambushing intruders.
Despite its size, the Shellsnapper is quite fast, and capable of leaping. It seems to be able to stretch its neck a small amount in order to bite opponents, similar to real-life snapping turtles. It is also capable of firing a power blast at targets, mainly frost balls. Not only is its shell capable of withstanding powerful attacks, but as it takes damage, it will build up a large amount of energy, and after a few more attacks, will release as a large burst, capable of stunning multiple hunters.

Complexity

The Shellsnapper resembles an enormous snapping turtle. Its main body is mostly unarmored, with an armored, flat skull akin to a turtle on an extendable neck, four big legs with minimal armor, a pair of Chillwater sacs and multiple ground drills on its underbelly, and a short, stout tail. The bulk of this machine comes from its shell: a massive, circular, heavily armored piece that nearly covers the whole machine and is blue with energy, which will turn orange if enough damage is applied to it and can be covered in foliage depending on how long it sits. Along the shell are four connection bolts that keep the shell on, with two extra on a smaller, elevated area behind the shell, and four frost blasters, capable of spewing a frosty mist or shooting frost grenades. Under the shell are four plasma generators that make plasma attacks, a few Sparkers, many refining cores, and a kinetic dynamo in the center that serves as the reason the Shellsnapper's shell turns damage to energy and is only exposed as a weak spot when the main shell is completely off.
The Shellsnapper cannot get energy from arrow attacks, and destroying the shell bolts removes a big section of the shell, exposing the plasma generator. When the main shell is fully off, the kinetic dynamo is exposed, providing an exploitable weak spot. Shooting the Chillwater sacs disables the Shellsnapper's frost blast attacks. The frost cannons can be torn off and used as a weapon. However, the Shellsnapper's resistance to frost damage renders the cannons next to useless.

Discovery

Shellsnappers, being a combat class machine, was designed and produced by the rogue AI known as HEPHAESTUS during the Derangement. They were one of many kinds of 'hunter-killers' whose sole purpose was to kill humans.