Worshipper – “Betrayal” [2nd campaign, 1st mission]

Besides, the mission is easy and can be completed in 15-20 minutes.

BUT WHY?
I spent time guiding my poor, weak demon across the entire map, collected artifacts, learned spells from "chests" (and I'm not talking about gargoyles :D), visited all the objects that increase the hero's stats... people put effort into creating the map, and they added so many interesting things to it - and I'm supposed to complete it in 15 minutes?! What are you talking about!