data/creaturescript/script
kill.lua
function onKill(cid, target, lastHit)
        if isPlayer(cid) then
local v = { killer_name = getCreatureName(deathList[1]), killer_level = getPlayerLevel(deathList[1]), target_name = getCreatureName(cid), target_level = getPlayerLevel(cid) }
local reward = doAddContainerItem(corpse.uid, 5805, 1)
doItemSetAttribute(reward, "description", "Aca pongo la descripcion del trofeo")
doItemSetAttribute(reward, "name"," " .. GetCreatureName(cid).. "'s trofeo")
        end
    return true
end

creaturescript.xml
<event type="death" name="Reward" event="script" value="reward.lua"/>

Agrega esto en creaturescript.xml
registerCreatureEvent(cid, "Reward")

Aqui cambias el item
doAddContainerItem(corpse.uid, 5805, 1)