Gaudium attacking an Eldritch Abomination with a truck. Through a wall. And Barry and Sarah, just before, attacking the same abomination with their bare hands in defense of Elaine.
Lucifer himself gets a ton of them, but especially whenever he turns up, reveals that everything that has been happening has been a part of his plan, and reminds everyone just why they are afraid of him. So every two or three issues really.
The first story arc of Lucifer involved his trip to the House of Windowless Rooms, an alternative hell where he would be as powerless and mortal as any human, in order to get his wings back.
Two gods, seeing their brother Kagutsuchi running off to kill Lucifer, wielding a Vorpal Sword:
Yama-no-kami: He has his sword, and his strength. And the advantage of familiar ground. Susano-o-no-mikoto: That is so. And the lightbringer has nothing save his wit and his will. I find that this fails to console me overmuch.
Christopher Rudd's duel in hell against a faster, stronger, and much bigger, opponent comes to mind
Rudd: Ten hours a day, for twenty years, to teach the fast, and the strong, how to be swordsmen. To teach them what else they needed to win.
Mazikeen has about as many as Lucifer, but of particular note is her...creative solution when faced with a perpetually regenerating opponent in Children And Monsters (Vol. 2). She eats him. With gusto. Cestis herself notes that even the Jin en Mok probably can't manage "bodily resurrection from the limbo of the large intestine." Also, her solution to the dilemma posed for her (and everyone else) in the finale of The Divine Comedy arc.
Destiny of the Endless of all people gets one in The Wolf Beneath The Tree (Vol. 8), by becoming the only person in all creation to beat the Morningstar in an argument.
Destiny: And now you change your mind.
Mazikeen revealing that she can speak Ruhok. And, in its own right, the sheer amount of disturbing Fanservice she provides before making use of this fact.
Similarly, when Mazikeen smoochesBeatrice in front of all the angels in the Silver City. While Flipping the Bird. After pulling their heavenly behinds out of the hellfire.
Beatrice, I need your help in one more thing. Passion is blasphemy in this holy place. (beat) And I have a great need to blaspheme.
Uriel ramming three feet of steel through Sandalphon.
Elaine Belloc tearing apart Lucifer's Cosmos and dumping it in her Creation.
In volume 9, when Duma saves Christopher Rudd by breaking his aspect of silence for the one and only time before or since. Made more epic because his first word - "No" - receives a panel at the end of the page, creating an awesome suspense that made you wonder what was coming next.