Lots of prefabs

Hello, silly question here.
there's a asset with +100 magic spells for free on the unity store..
312mb...

but all i want is to use just one of them.. the question is: what should i do with the rest?
manually delete? or when you build the game all the not used spell will disappear?
i try to delete some.. but the textures went crazy.

thanks guys..

 

When you build your game, any assets you aren't using are stripped out. So you could ignore them.

Or, if they get in your way (make it harder to find what you're looking for, cause build times to explode due to extra unused shaders, etc.), then delete stuff you don't need. Just be careful. If the textures go crazy, it means you accidentally deleted something you do need.

 

many thanks sir.