This impressive katana was made from sturdy E-1187 micron-bots. Those made the weapon capable of rebuilding itself when damaged - not as fast as nano-bots would, but with less loss of bots. The blade was powered by a unique set of bio-powered, reversive energy-packs - possibly a SSC product. Despite its claim to immortality, the weapon is no longer alive. Hard combat seems to have made the micron-bots dysfunction. It would be cheaper to build a new weapon than trying to revive this example.