Lock treasure to first dtd-npc-killer, or option to broadcast first dtd-npc-killSuggestion

Hi,
is it possible to add one of these 2 features?

We would like to lock the DTD event for the player who kills the first DTD-Npc.
If this is not possible, would it be possible to broadcast the first kill of a dtd-npc?

That'd be great :)

noted this for later