Start the quest on sPromo +1 on the level where NPC Violetta. 

We are now near Vairon and go down to the -1 descent next to the sign 

We now have 4 levers in front of us, at each station we put 100 daemons to move us to the boss map. Each position is one boss must kill 4 bosses to get a reward. 

1 Waster 

We keep heading down the map until you reach the ladder.

At the top is located boss. 

2. Crusher 

Here, too, we head down the map all the time, bouncing slightly to the left. We will reach the bridge over which we pass and go down the stairs down where awaits us another boss. 

3. Kiler

Go up the map until you reach stairs; go up, then immediately down the stairs to the left, then right and up, slightly left, and up again until the next stairs. 

Enter by stairs up, and there is another boss located there.

4. Smasher

We will reach the last boss by bouncing minimally right and all the time up until you reach the pyramid. At the very top of the pyramid you will find our boss. 

After killing each boss return the same way we arrived. 

Now if we have killed all 4 bosses you can go for our reward. 

Return to the beginning of the quest, click on the Machine that will transfer us to the room from the rewards.