Making a Grenade

I’m looking to make a grenade but i’m unsure how to make it detect things within 10m of itself to do damage, is there a way to find objects within 10m, or cast a ray in all directions?

This is probably what you’re looking for:

With Raycast Sphere, how can I loop though the names of what was hit to find out if it was an unit with HP and how many etc?