Beast Spirit of Steel
The Beast Spirit of Steel was created from Ancient Wisemon of the Warrior Ten. At some point it was found by Mercuremon and allowed him to slide evolve to Sephirothmon. When the spirit is ultimately beaten by the Legendary Chosen, it is stored within Kanbara Takuya's D-Scan. It is later transferred it Minamoto Kouji's D-Scan when they are preparing to to hyper spirit evolution.
(Note: Is called Spirit of Steel B in the TCG.)