Noble Phantasm are "crystallized mysteries", powerful armaments made using the imagination of humans as their core, and weapons or abilities owned by Servants. They are the embodiment of the ultimate mysteries of a hero that symbolizes his existence through historical facts and anecdotes.
There are three classifications given to certain Noble Phantasms such as Anti-Unit (Self) Noble Phantasm, Anti-Army Noble Phantasm and Anti-Fortress Noble Phantasm. In the game, every servent have their exclusive Noble Phantasm. Arthur's Excalibur, which unique skill is powerful full screen killing. When the Noble Phantasm is developed to a certain level, it will show more extreme kill ability and become the key role in deciding the final standings.