Episode 60 of The Trigan Empire
Janno’s Five Tasks
aka The Zallus
De proeven van Janno (Dutch title)
Janno’s trials (Dutch title, translated)
Written by Mike Butterworth
Illustrated by Oliver Frey
Janno’s Five Tasks was originally published in 8 instalments in issues 761 (14 August 1976) to 768 (2 October 1976) of Look and Learn magazine.
It is reprinted in Volume 5 of The Rise and Fall of the Trigan Empire (Rebellion).
Plot summary (Dutch)
MediaFire via British Comics Compilations