Lucien's room was on the third floor of the castle, more than ten meters above the ground. Even a knight would get hurt if he fell onto the ground from this high. However, casting Feather Fall was also not a good idea, since Lucien would for sure become an easy target when he slowly glided toward the floor.
Therefore, Lucien jumped out and did not cast any spells, so he fell freely for half a second, then he quickly cast Flying, using the gravity of stars to slow down his falling.
With that perfect calculation, Lucien landed on his feet safely in the garden. Although the controlling of the right time was greatly challenging, Lucien's strong spiritual power and outstanding calculation ability made the whole process simple for him.
After landing, Lucien quickly dodged the colorful light pieces falling from the sky, and directly rushed to the castle gate.