For a moment, Tyr sat there simply contemplating how amazing this technique could be.
'In the future, I could just sit down to cultivate and have dozens of crows gathering Aura for me at once. The most significant thing when it comes to seeing this technique's true potential is how fast a hollow crow can turn into a real Aura crow.'
Tyr decided to call the crows that weren't visible to the naked eye 'hollow' crows.
This was because he already knew what they looked like, having absorbed the cultivation technique and understanding how it all worked.
Before leveling up to permanent crows, the hollow crows would be like black-outlined figures with a see-through body.
Their wings and beaks were prominent, but the rest wasn't there. They had a wispy, shadowy energy that followed them.
As with every other cultivation technique, only the user, Tyr, could see these hollow crows.
