Thunderball.
Amongst the defenders of Middenheim during the Storm of Chaos was a Giant nicknamed Thunderball, the Middenheim Giant, the loader for the colossal cannon known as Ulric's Thunder. Sadly, Skaven infiltrators saw Thunderball as an easy target. They used warpstone to mutate his body into a writhing mass of tentacles as he slept. He rampaged through the streets, eventually being felled by Count Valmir von Raukov's Dragon Bow.[1a]