Talk:EMIYA (Assassin)/@comment-27413909-20180427051039/@comment-27971189-20180427085821

Its simply because magic used by Kiritsugu and EMIYA easily tied to their physical performance, affecting their physical appearance in process.

Its already said in FZ that Kiritsugu can use Time Alter with no side effect thanks to Avalon while on EMIYA case, if he wishes to use the traced weapons properly in instant he also need to trace the value and experience.

Unlike, say, Volumen Hydrargyrum that using mercury as medium. Not to mention their job easily needed them to use it as much as possible if they want to get their job quickly done.

That and we also has EMIYA Alter who goes even darker as he pushed it further with drugs to gain equal footing against stronger Servants.