Shamana appeared in the series Flesh: The Legend of Shamana in 2000AD (written by Pat Mills and Tony Skinner, fully painted by Carl Critchlow).
The series ran to 18 episodes and appeared in progs 800-808 and 817-825.
It was also reprinted in two parts in the Judge Dredd Megazine free graphic novels (given away with issues 310 and 311).