D-2100

'D-2100  is an submarine artifact used by Under.

Overview
The submarine artifact owned by Under. It is equipped with strong armor plating and anti-underwater UMA torpedoes. However, if the torpedoes run out, the user must shave then years off their life-span to reload them. Under bypasses that drawback by utilizing Creed's Undecrease ability. D-2100 also possesses a radar that can detect any nearby UMA or Artifacts, although it's usage is limited to the sea.

As an aside, Kain, the UMA that befriends Under, thinks that D-2100 is a fellow UMA like himself. Because of that, he will often try to feed it fish that he has caught, leaving them behind on the deck. Since it would be wasteful otherwise, Tella cleans and fillets them for Under to enjoy.

History
At some point, Under acquired this artifact.