How to leave a message in the system or world when one player kills another

Junior Spellweaver
Joined
Apr 16, 2016
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Hi everyone,

I would like to leave a message in the system or the world when one player kills another.
Right now I just know the way filter in world2.formatlog with type = 2.
But this way is complicated and need the code to push the message to the game.
If you have any idea for it, please for me advice.

Thank you.