Particle/Line renderer sword slash effect

Hi,

I'm looking to do a sword slash within unity.

The effect i'm searching is just like this one:

http://videogamecritic.com/images/gen/strider.gif

Can somebody give me a guide or some glimpse at how can I do this?

Can I deal with this using a particle system or a line renderer?

Or I would need to go with textures?

Thanks in advance :)