Lin Yan asked.
"Simple. Nature spirits draw power from nature itself. As for servants who are human spirits, it's simple—just like how we eat meat. They do the same. Although replenishing mana through the master aided by the Holy Grail is usually enough, having many people is better than having just one for a large intake, right?"
Rin Tohsaka continued explaining.
After thinking it over, Lin Yan voiced his own conclusion.
"Servants can convert human emotions and souls into mana. If someone wants to strengthen their servant, that's the most efficient method. There must be quite a few masters who slaughter humans as sacrifices for their servants."
"Yes." Rin Tohsaka sighed softly and continued. "By sacrifices, you mean there are unscrupulous masters who kill people everywhere to make their servants stronger?"
That was why.
This war was so cruel. If a participating master was a bloody, violent person willing to use any means necessary, then death was inevitable. Even innocent lives would be dragged into it.
It depended on the master, not the servant.
In the end, a servant was merely a blade.
The one holding the hilt decided where that blade would strike.
"Right. But smart people wouldn't do something so pointless, would they?"
"Listen. No matter how strong a servant is, the mana container itself has a limit. Since it can't store mana beyond its maximum capacity, there's only so much killing they can do. Besides, if they make too much of a spectacle, the Association won't ignore it. Most importantly, other masters can easily deduce a servant's abilities and true identity from the causes of death. Naturally, the master's own identity can be exposed as well. In the Holy Grail War, those who hide their identities hold an overwhelming advantage. Ordinary masters won't let their servants fight