I think I found a way to do this before, but I forgot, so here is the question.
If you knock out someone on team 4, they drop a golden keycard. However, if you knock out anyone on team 1, 2, or 3, you get no keycard. Also, if the member on team 4 does not have a golden keycard in their inventory, they do not drop a keycard either.
Player knocked out (lifecycle → run wire pulse (wire repeater) → drop item (I haven’t read the guide on how)
The wire repeater can be set to a specific team that can only have the pulse on that team so you can have 4 with 4 different item spawners