After a few minutes of tireless work, Damon finally finished crafting the ideal battlefield for mutual destruction. He left his severed arm in a convenient location, staged just right to show he had fought with everything he had.
The scene told the story clearly: Ashcroft had been trying to kill Abellona while she was unconscious, but Damon had protected both her and the crystal platform above.
That was why he was dead. He died for her.
Damon almost shed a tear at how heroic he looked in his own masterpiece.
"She better build a statue in my honor… and think about me all the time."
After setting the stage for his grand death, he left Abellona with one of his high-quality blankets from the system, along with some of his clothes for her to wear.
Well… because he had taken her ring.
Of course, he had done that earlier before he even fought Ashcroft.