[COLOR="DarkOrchid"]I want to know the name of the track that plays in the preview and during most battles in Fate Stay Night. /COLOR]

I think it's the track named "Seihai". If I remember correctly, this track's in the OST of the anime.

I listened to this track and it's not what I want sorry.

Also the fuller version of this track plays during the fight between Saber and Rider in episode 12.

I found it it's Unmei no Yoru