Struggling to get portality

[AKiwi]

This is my last task to do in the game and I cant seem to figure it out. It says "kill a dummy with Block B5" Anyone have a workshop room that will complete this or can tell me a setup to use to get it?

[antvelm]

I think you can try this workshop level:

https://steamcommunity.com/sharedfiles/filedetails/?id=1625187655&searchtext=