FATE/STAY NIGHT X TALES OF BERSERIA CROSSOVER CHALLENGE

After Saber destroys the corrupt Grail and Shirou defeats Gilgamesh, the last remnants of Angra Mainyu latch themselves on to Archer and warp him away to a different reality. Upon waking up in a prison cell, Archer is shocked to discover that not only does he have a physical body, but his connection to the Counter-Force is also gone. Exploring the prison, he soon comes across Seras and Velvet Crowe. What will become of Midgand's fate now that the King of Fakers, The Wrought-Iron Hero now walks their lands?

NB: The Holy Grail is a device that defies logic, so it should be expected that it possess the power to warp to different realities and give Archer the ability to trace EX-Noble Phantasms. Also:

Pairings are of your choice

You can choose whether Seras lives or dies

EMIYA must possess the ability to trace EX-Noble Phantasms (I got the idea from a time travel fic)

Bashings are optional

The EMIYA I recommend should be the one from F/SN ULBW. But the choice is yours.