Now, here's Lucifer's second or third best feat:He went outside of the presence's creation [Which was everything, including Hypertime, all the multiverses (Lucifer commented that "anyone" could make a multiverse to Mazikeen)], and there he mercy killed his Brother Michael.
Michael was the 2nd or third most powerful being in creation alongside Lucifer.
Lucifer was the Will, Michael the power (The presenc edirectly imbued him with power, he was the one that easily overturned the rogue angels without using the presence's power).
Lucifer helps "kill" him [he instantly reforms clean and healthy] and the release of energy that would have destroyed the entire DC omniverse and rebboted it is chaneeled by Lucifer to create a new reality that is entirely deperate from the Presence.
This omniversal big bang doesn't even scratch him:
http://static.flickr.com/54/127050112_477047a0e7_o.jpg
And slightly less impressive, remmember the Source wall?
The one holding the promethian giants, Darkseid, anything that touches it with nothing ever being able to get to the other side?
Lucifer ignores it and The source [The source of Darkseid's powers and the powers of Takyon and the other new gods], and it apparently doesn't move [either scared or unaware of him], so that he (Lucifer) can take a good view of all creation.
He also shows the ability to watch everything ahppening in the universe at once without any difficulty and finding someone.
Now, a few scenes from Lucifer as he builds himself a universe quickly (This is just a test version for him).
Lucifer laying out the rules in his new creation, note the SUN inside his hands:
http://static.flickr.com/44/127109552_79d5066e8a_o.jpg?v=0