How to weaken Deek and Roi?

As titled, in Homunculus map, there was this sudden message "Complete the pentacle to weaken Deet and Roi.". But HOW? I clicked everywhere in the map. This is supposed to be anti bot system introduced by MapleStory.

 

I don't think this works in Mapleroyals. Here, bots are catched by the community and the staff.
You can kill those monsters with Marsmen's Snipe though

 

You can also kill ludi rombots with snipe

 

So the question is, what can you NOT kill with Snipe?

 

APQ rombots

 

the mechanics to weaken him is not working.
I think that this is a serious problem, I want to kill the homunculuses without being disturbed by him

 

does this mean i need to make a mm mule just to kill this thing?

 

SMega for a mighty Marksman to come help you.

Also, I just realized I had made a typo there before. "Marsmen" hehe. Is that an alien?

EDIT:
I also wanna be serious for once. I actually agree this should be fixed. I understand it's not a high priority, and the map is not popular, but it's always annoying with stuff that doesn't work as intended