Vriin

It is unclear who or what or for what purpose Vriin was made, but we do know that he used to be a living, breathing Mega Titan that roamed around the world, but the reason of his existence is unknown. It is also known that after he was built his creators shut him down and buried him somewhere. It is not known where he may lie in slumber but he has not been seen in over a thousand years, and some even doubt his existence.

Weapons
Vriin was equipped with two large blasters on his arms for ranged combat, but he can mainly use his size and strength to beat anyone. He has no other known weapons.

The Key
It is said that the only way to awake Vriin is to find both parts of a sacred, hidden key that will activate him when they are connected. Once again, it is unclear what the parts of the keys look like or where they are, or whether they actually exist. All that is known for certain is that his creators probably had a good reason for shutting him down, and that it would be best if everyone forgot about him.