Fury of the Small. Is this a feat? Where can I find it?

[Cyclops08]

I see it used in Critical Roll with Nott the Brave. Sam uses it to enhance damage. Can it be used with Eldritch blast?
what source book has this?

[Pex]

It's a racial feature of goblins, introduced in Volo's Guide.

[Cyclops08]

It's a racial feature of goblins, introduced in Volo's Guide.
Wah. My Halfling cannot use it.
Thank you.