You probably didn't think it through when you stopped fighting and let the angel run you through with his sword.
He did think it through, but unfortunately for the both of you, he was entirely wrong.
After you died, he stood by your corpse for hours, waiting for your soul to ascend so that he could latch onto it. It never did, not in any way he could see, and he sighed.
"I was really sure this time," he said to your body. "I really thought this one would work."
He stretched out his arms and fanned out his wings.
"Oh well," he said to nobody listening. "I'll just have to find another and try again."
Without even a last glance at your body, he turned and took to the air.
* * * * *
You let the angel kill you!
That was fruitless, but kind.