Kiritsugu remained silent, having heard the explanation. So, he had been dragged into the situation, "chosen" for some reason. He checked his equipment, making sure that everything was there. His weapons, check. Magic circuits? Check. 

...Avalon, check.

Watching the people around him make their reunions, Kiritsugu knelt down and took out a vial of liquid. Pouring it on the floor to paint a magic circle, he placed the sheath Avalon in the centre and prepared his ritual. He would need a partner too, if what was coming up was true. 

Closing his eyes and remembering the very last time he had seen the servant he was about to summon, he began to chant. 

" Silver and iron to the origin. Gem and the archduke of contracts to the cornerstone. The ancestor is my great master Schweinorg.
 The alighted wind becomes a wall. The gates in the four directions close, coming from the crown, the three-forked road that leads to the kingdom circulate.
 Shut (fill). Shut (fill). Shut (fill). Shut (fill). Shut (fill).
 Repeat every five times.
 Simply, shatter once filled.
 ――――I announce. 
 Your self is under me, my fate(doom) is in your sword. 
 In accordance with the approach of the Holy Grail, if you abide by this feeling, this reason, then answer.
 Here is my oath. I am the one who becomes all the good of the world of the dead, I am the one who lays out all the evil of the world of the dead.
 You, seven heavens clad in three words of power, arrive from the ring of deterrence, O keeper of the balance ―――"！