The Initial Black Demon

"What kind of powers?" one of the Black Demons asked. 

Making eye contact with one another, Grotak motioned for Doit and Leat to lift up the ice cocoon. "First of all, they seem capable of using elemental powers more or less similar to what we can using Spiritual Energy."

"Second, they can create a mysterious beast to attack, defend, flee, and so on," Grotak continued, nodding once at Leat.

Leat flapped its wings and took off to the air, unleashing numerous lightning bolts in the area surrounding the group of Black Demons. All the Black Demons looked with a frown when their gazes shuddered for a moment, noticing charred bodies appearing in their midst. 

"And third, they're all invisible until they come into contact with us. When Doit was flying around, he seemed to have attacked some of them, causing their bodies to be revealed. That's how we were able to discover them," Grotak concluded.