VIDEOS:
Dream vs. Lucifer
The Oldest Game is described as a game of transformation. While Dream and Lucifer don't literally transform into the forms they take, the wounds they inflict onto each other manifest as though they were actually happening. If they weren't immortal, odds are it would have killed them both.
Example of:
Wizard Duel
Example of:
SatanExample of:
Rhymes on a Dime