Adamantium (Yost Universe)

Adamantium is an indestructible metal not known to Earth. With that metal,it can pierce through even the strongest metals and can deflect incoming blasts except for Vibranium.

The adamantium was used by Weapon X to infuse the indestructible metal into Wolverine,making claws sharper and more deadly and during World War 2,Stark Industries created a new shield added with adamantium for Captain America.