He puts the „baby” in charge of the gate to the void, after making it clear that he is his master.
„He had all the other angels .. scared. Scared shitless”
The Angels also acknowledge the fact that once he recovered his wings he is as mighty as he ever was.
Thus, what he did since Morpheus cut down his wings in hell wasn’t at full power
„He went down to the afterworld of Izanami, surrendering his immortality at the gate. He faced the gods of that place, powerless and alone… He returned with his wings once more upon his back. He is as mighty as he ever was.”
Lucifer shows once again that he doesn’t care about Morpheus’s anger and warps his dimension
He ressurects Musubi and threatens her that if she dares attack him, he will easily kill her.
Lucifer ignores the source and goes to where he can see everything in the Universe at once, without much difficulty.
The „baby” that Lucifer put in charge of guarding the gate is decimating Heaven’s army
It’s pretty much insinuated that before he rebelled and he still was God’s servant, Lucifer was at least as strong as Michael. „Michael is an archangel. Of All God’s servants there is none so mighty. At least, not now”.
Upon hearing that God doesn’t approve of his creation, Lucifer folds the gate through space and time so that a gate exists on every realm in every world.
From Lucifer : Nirvana
The Silk Man and Perdissa plan Lucifer’s demise. They send spirits of sleepers fashioned into demons to attack him, which he easily defeats by killing the human souls which anchor them.
It is also confirmed that Lucifer’s creation is a Multiverse.
Lucifer threatens Sandman (Daniel) not interfere in his path
A short recollection of big events happening up until this point. Apparently, a third of the host followed Lucifer’s side in his war against Heaven.
„The demiurgic power, bestowed by God himself .. Michael’s death and birth released that power, in an explosion so vast its like had only been seen once before.” And Lucifer took all this at point blank with relative ease.
Lucifer made time in his creation move a lot faster than Yahweh’s
The Basanos attack Lucifer’s creation
Lucifer’s reaction time is apparently as „near as possible to being instantaneous” and could have circled the Earth before his image faded from Mazikeen’s eyes.
The Basanos attack Lucifer and he quite literally ignores their attack as if nothing happens and gets ready to kill them. But he finds out that his wings have been poisoned by Izanami therefore Lucifer is defeated by his own power
„The child and the Death streched out their hands as one, and the ground heaved. Entropy undid itself”
The Basanos don’t let Jill Presto die. „All our power is focused on you. You are the prism through which destiny bends as it passes. The Sun could sooner douse itself in the sea than your body could sustain a wound.
The first things created were Michael and Lucifer through which everything else was made. Also, it is stated that Lucifer is made of will
Lucifer talking to Death of the Endless : „You have no claim over me”. Death doesn’t contradict him.
The Basanos : Our attack on Lucifer could not have succeded without her.
…
Suzano : If he lives he will recover. If he recovers, we are all lost beyond redemption
Death of the Endless : You and Michael were his first ideas big ideas.
…
Threatens Death :
Lucifer : I intend to survive this. Anything you say ought to take that into account.
Death of the endless : If you kill the messanger in the long run, you just get less mail.
He eventually manages to get rid of it, although not easily ..
Then goes to fight Amenadiel, the angel who he promised to fight earlier in the story. He wins by outsmarting and manipulating him. Remiel comes and says that a case could be made because Lucifer didn’t have his heart in the chest but once Lucifer gets to full power, he quickly changes his mind.