Marble

Michael handed the spatial satchel to Tatjana. He didn't know what to do with the goods to stimulate his monsters' evolutions. Tatjana was the woman for that job. She had the Eye of Evolution and knew precisely how to process the items to evolve the monsters.

Several vials with black viscous content appeared in her hands alongside two stones. One of the stones was a Darkness Stone, whereas the other one was a Crystallized Blood Stone. The latter looked like a Darkness Stone at first glance, but it glimmered brightly as the afternoon sun reflected on the smooth surface.

Tatjana retrieved another vial, but Michael couldn't see the content at first glance. The vial was sealed perfectly, and Michael could only see through its red surface by using Spirit Eyes with several Enhancement layers. 

'The Greater Demon's Blood,' Michael recalled what he'd ordered from the Bartholomew Corporation a while ago.