Harshnag

Harshnag the Grim was a frost giant and member of the Gray Hands. Waterdhavians tended to use Harshnag as an indicator that that their neighborhood was about to become a war zone, and to get out of the area as fast as possible.

Quotes
"Come here little demon, and stop tormenting the nice townsfolk...I will squash you like a bug."

Appearances

 * City of Splendors: Waterdeep
 * Heroes' Lorebook
 * Storm King's Thunder

Behind the scenes
City of Splendors: Waterdeep, as well as Storm King's Thunder lists this character as being named Harshnag, while the Heroes' Lorebook calls him Harshnagg.