Hi,
I’m looking to do a sword slash within unity.
The effect i’m searching is just like this one:

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 
You might try thiis from the asset store (its free):
You might try thiis from the asset store (its free):