Kai Johnny Mosaker, known professionally as Trym Torson or just Trym, is a Norwegian drummer, formerly with Zyklon. Torson started playing in the extreme metal band Enslaved and was later invited to play in black metal band Emperor. He co-founded Zyklon together with Emperor member Samoth. His style is heavily influenced by jazz, and he is known for his fast playing, often consisting of blast beats and double-bass drumming. He is also a tattoo artist.