C270 Wind magic ninja technique
Remains did not require substance. This ninja technique was simply a visual trick to leave the image in place in order to confuse the enemy.
If this was an image technique used by the Aeolus Sativus, then it could only mean that he was hiding somewhere other than the two images, planning to deal a fatal blow.
Thus, no matter where in Aeolus Sativus, this place was extremely dangerous