Can't believe I just noticed this right now, but Lucius is making the debris float when he states his goals:
This most likely means that he didn't just obtain Lucifero's raw magical power, he also obtained his gravity magic. I had suspected it, but this chapter probably confirms it?
Beelzebub, where you at son? Bring your spatial ass over here so that this man Lucius can become the fusion of Dialga, Palkia and Giratina