Nerinium

Nerinium is a rare metal found only in the Darkness Realm of Underworld. It is usually found quite deep underground in this realm, but has also occasionally been found on the edges of Magma rivers in Fire Realm.

The Metal is pitch black in color, and is described as one of the most indestructible metals currently known, ranking in the top five. The only known forces that can melt Nerinium is a heat force as strong as Hellfire, and once heated it can take a week to cool.

Nerinium is also capable of being damaged by Starkada abilities, as they are an Azin-type ability that defies typical physics.