Could they have thought things through a little more? He was able to solo a Rank S dragon to the point where there was no visible damage on the corpse, hence why it's his mansion's centerpiece when you enter the place. Unless you tell me that they that those 500 people had a chance against a...
The manga doesn't remind you much of it, but he has a summoning limit. Depending on the level of his summoning skill, he can have at most a certain amount of summons. The ratio was his level of summoning times 10. His current skill level is at 6 so (6x10)=60 max summons.
@ Namelessmoreless Itou is the 'God' that brought him there, Narnia is Elizabeth's old party mate who went to marry the other party member who had lost his leg.
If getting hit by that truck causes a time-space shift, probably time-travel so that I can study up to that point to see what caused it to happen so that maybe we could achieve something greater.
Lack of Faria or Macron in this chapter makes me a little sad... You'd think that at least some of them would consider some stuff after almost 4 whole months...
@Jimbobjoe The mess called the 'Water God' is currently A.W.O.L. and even his direct subordinates can't get a hold of him. The one who asked Takumi to do it is the chief retainer (secretary) of the water god and chose him because he was already close enough. Kaiser was far away at the time.