Archer finally kills shirou in their final battle in the unlimited blade works. (in unlimited blade works shirou only won because archer hesitated at the last moment this time, archer didn't hesitate and finished shirou with that blow)
As archer's existence starts starts to fade, the reality marble with out someone sustaining it starts to collapse. (it looks like when raider vs gilgamesh, and raider's reality marble starts to collapse)
As the world around him starts to collapse, archer leaves shirou's body and walks up the hill, passing by the swords of his reality marble.
The blades in turn rediated with energy as if to give archer a final salute.
He reaches the top and sits on a large rock looking at the collapsing world around him.
He sighted "it's finally done, it's finally over" he muttered
Archer looks next to him and sees excalibur and Ea radiating with energy, as if signaling him to do something.
AN:(EA is gave shirou a headache but it is not impossible to trace it, archer being shirou's badass self could trace it with enought energy)
"Alright" archer said as if knowing what the sword was trying to tell him.
he smiled and picks up excalibur and Ea, points them to the sky and said "unlimited blade works"
As all the swords in his reality radiayed more energy and became broken phantasm as multi colored light erupted form the swords around him.
The last thing archer saw is a world dyed in white.
Archer finally had the heroic death that he never had.
And that is how archer's story ended, or is it?
For once luck seems to be on archer's side as the parabox he created seperated him from realit and the explosion resulting from a world of broken phantasm sends his soul to be reborn on a distant parrallel universe, further than alaya or gaia could ever reach and furthere than zelretch could ever hope to see,it sent him to another side of infinity.
He is reborn as tigrevurmud vorn and son of an earl.