Way of the Wicked
I like to smash little'un
Grumblejack was a prisoner at Branderscar prison but managed to break out from the yard and follow calls from his father Asmodeus to the Horn of Abbadon where he drank from the Unholy well and became great.
He joined with the stalwart band of adventurers dedicated to overthrowing dead Aroden and leading Cheliax to a new Golden Age.
He is brutush but powerful.