thought this was already an event, went to use it, and found its not :(
going to try and add this too... but not sure how well i will get on ! lol ..
see that you already have a ondeath event set (just a listener for the discord announcements?), just not within the custom events...

looks like "only" customevent.java, customeventshandler.java and eventsredirect.java ? .. needs "updating" ?
(and docs of course)

got this working to, so will issue PR
mainly cause you did all the base work, only needed a few things adding in...
again Thankyou, its great to be able to give back a small amount !