[Kingly_Krab]

"Killer variables," says Secrets.

$killer_damage
$killer_id
$killer_skill
$killer_spell

Something like this can be done for players killed by players.

sub EVENT_DEATH_COMPLETE {
    if ($entity_list->GetMobByID($killer_id) && $entity_list->GetMobByID($killer_id)->IsClient()) {
        ##Do whatever
    }
}