Eros Thanatos

Eros Thanatos is a giant built by the ancient Aegis Mobians to defend the planet from foreign invaders. Eros stands at around 3,000 feet tall composed of some unknown metallic substance and appears to be immune to everything. However, if it's activated one should enter the giant itself through it's exposed chest, then move up into the area where a heart would be and disable the energy core. After this, the invaders would have to head up into the head and destroy the back-up energy core to then disable Eros Thanatos.

History
The giant was built during the height of the Aegis Mobians' civilization to defend the planet from any alien invaders. Many years later, during the purging of the Aegis Mobians, they were tempted to use the giant to protect them, though they decided not too as the giant couldn't be deactivated. So before their contingency plan, they hid away Eros. Now only an Aegis Mobian is able to activate it, but the chances of that happening are very low.

Armament
Eros Thanatos is made of an unknown material that makes it immune to all attacks and weapons, so it makes it impossible to destroy from the inside. Eros is able to fire powerful blasts of energy from its eyes which have the potential to destroy large strips of land. Also, it is able to fire hundreds of missiles from its back and can release an electric shockwave from its body. Lastly, it is physically powerful enough to destroy large parts of mountains and can cause huge tremors.