I don't like the mission with this hero and the exit at all, I generally hate missions with a time limit, after you defeat the arriving hero, what is the sequence for completing the mission? I can't waste that much time, I haven't launched it since last year!!!!!!!!!!! Waiting for someone to describe it!!!!!!
Why not try to complete it yourself? The objectives are given quite clearly :confused:
Find the prison, free the hero - enter the mage's hut - they will show you the location of the prison (to the right of center at the bottom of the map). While heading there, level up on neutrals. Help the freed hero - go ahead of him to the lower left corner of the map. Clear the path - he will give you 50 berserkers. Go back to the surface and head to the upper left corner of the map - there is a castle that needs to be retaken. An objective to recover the caravan will appear - they will show you where it is located.
If this helps, then good luck!:)