From/Beyond The Abyss

Humanity's last master Fujimaru Ritsuka and Co is trying their hardest to defeat the primordial mother goddess, Beast II Tiamat in the last singularity in order to save humanity. But even after trying so hard, they weren't able to really hurt Tiamat let alone kill her. Time was running out. Tiamat has opened up her wings and was getting ready to escape the underworld. Is this how it's going to end? Is this the full power of humanity? Isn't there something that can turn the table?

Just when they were losing hope, Merlin said that they have a chance of defeating Tiamat! Humanity isn't lost yet.

"The conditions were met for him to arrive."

"Does that mean?!"

"Right. A grand class servant!"

"It's true! We can detect him! A grand class servant. And,"

"And?"

"A grand class servant. And a foreign existence?"

NOTE: I DO NOT OWN ANY OF THE SHOWS OR ANYTHING MENTIONED IN THE STORY. THEY BELONGS TO THEIR RESPECTIVE AUTHORS.