Adamantium

Description:

Metal Alloy

Operator:

- Wolverine
- Ultron
- Bullseye
- Lady Deathstrike
- Cyber
- X-23
- Russian

Miscellaneous:

- Virtually Indestructible
- Man-made steel alloy which does not occur in nature
- Exact chemical composition is a United States government classified secret
- Created as a heated liquid, unchangeable once it becomes solid