[quote=@Fading Memory]
I’ll be honest, I’ve actually got no clue where that Brute feature comes from and it has me mad curious; is it from the new Tome of the Multiverse or is there another book I’ve missed? It seems pretty good and I just wanna cog its locale. I managed to find Tsak’s class after some digging, but Brute has been eluding me.
[/quote]

Brute is something that Monster Manual bugbears have. When I made Brutrumukk, I decided to swap the Long-Limbed feature that Volo's Guide PC bugbears have and take Brute instead.