How does Illya overpower Alter Saber's Excalibur with her traced version?


A [traced Noble
Phantasm](http://typemoon.wikia.com/wiki/Tracing#Projection_.28Trace_Version.29)
should be one rank below that of the original.

How was Illya able to overcome the difference in power?

Clearly she traced [Excalibur](https://i.stack.imgur.com/2qbMk.png) and not
[Caliburn](https://i.stack.imgur.com/Gf8nN.jpg).

[![Trace-
on!](https://i.stack.imgur.com/UsPsk.jpg)](https://i.stack.imgur.com/UsPsk.jpg)




It would appear that Archerko Illya traced Excalibur and overloaded it with
prana turning it into a [Broken
Phantasm](http://typemoon.wikia.com/wiki/Noble_Phantasm). Which raises the
weapon's rank by one.

One would assume that the two Excaliburs would cancel each other out, but
Saber Alter, unlike the typical Saber only has an Magic Resistance of [Rank
B](http://typemoon.wikia.com/wiki/Saber_%28Fate/stay_night%29#Magic_Resistance)
since her Alignment is Lawful Evil, which might make her more vulnerable to
the effects of Excalibur.




It would appear that Archerko Illya traced Excalibur and overloaded it with
prana turning it into a [Broken
Phantasm](http://typemoon.wikia.com/wiki/Noble_Phantasm). Which raises the
weapon's rank by one.

One would assume that the two Excaliburs would cancel each other out, but
Saber Alter, unlike the typical Saber only has an Magic Resistance of [Rank
B](http://typemoon.wikia.com/wiki/Saber_%28Fate/stay_night%29#Magic_Resistance)
since her Alignment is Lawful Evil, which might make her more vulnerable to
the effects of Excalibur.

