"Down With a Touch
Trap of Argalia!"

Yet, killing is not the primary intent of Rider's lance.

A spear is a spear, of course. If stabbed into the enemy, it will draw blood. If pierced in the heart, it will kill. But it is nothing more than a cavalry lance; its force has not been strengthened by thaumaturgy, and it did not possess any special property to penetrate all defenses. It was not fated to pierce its enemy's heart in any way. Despite all of the above, the power of this lance is deadly in battle.

Berserker shook violently as he felt his body collapse to the ground. The solid earth which he stood firmly on disappeared, causing him to momentarily forget the sword he was supposed to swing down. Still, the smile remained on his face. He felt no shock at all. But no matter how hard he tried, it was impossible for him to overturn this preposterous condition.

The Trap of Argalia, the carelessly named Noble Phantasm of Rider, was a spear that could only do what its name suggested. According to legend, this beloved lance of the Cathay prince Argalia causes anyone it touched to fall—and to heavily armored knights on the field of battle, a fall inevitably leads to death. Aside from that, it is not difficult to imagine how much glory the use of this lance brought its users in those pompous jousting tournaments.

Used on a Servant, this Noble Phantasm realizes its legend by forcibly returning its target to spiritual form from below the knee. Regardless of where the lance hits—even if it is on armor woven by mana—the prana supply to that part of the body will be physically cut, rendering it temporarily impossible to take form as flesh and blood.

- Vol 1 Chapter 4