Example Kill (TFS 1.2)

local t = {
    ["demon"] = {
        message = "You killed a demon!",
        config = {
            --add something else
        }
    }
}

function onKill(creature, target)
    if not target:isMonster() or target:getMaster() then
        return true
    end

    local k = t[target:getName():lower()]
    if not k then
        return true
    end

    for i, damage in pairs(target:getDamageMap()) do
        local x = Player(i)
        if x then
            x:sendTextMessage(MESSAGE_INFO_DESCR, k.message)
        end
    end
    return true
end