Tbate World Overrun

Gilgamesh from the fate universe 'dies' again, but this time he's transported to the world of TBATE. How will this affect Arthur and his adventures?

All credit goes to TurtleMe, the original author of Tbate and @Kimera_1, the author of Gilgamesh in TBATE. By all means, my ff was highly inspired by his and this is not an attempt on plagiarism.