void main()
{

object oPC = GetEnteringObject();
string sAmbush = "An Ambush!";
effect eEffect = EffectVisualEffect(VFX_IMP_DUST_EXPLOSION);
object oCloset = GetNearestObjectByTag("armoire_rh"); // change this to your custom placeable tag
int nVoiceChatID = VOICE_CHAT_BATTLECRY3;
int nObjectType = OBJECT_TYPE_CREATURE;
string sTemplate = "goblin_rh"; // change this to your creature tag
location oLoc = GetLocation(oCloset);

if (!GetIsPC(oPC)) return;

if (GetObjectType(oCloset) == OBJECT_TYPE_PLACEABLE)
{
FloatingTextStringOnCreature(sAmbush, oPC, TRUE);

    if (GetHitDice(oPC) >= 15) // change these values as appropriate
    {
ApplyEffectToObject (DURATION_TYPE_INSTANT, eEffect, oCloset);
    CreateObject(nObjectType,sTemplate,oLoc,TRUE);
    CreateObject(nObjectType,sTemplate,oLoc,TRUE);
    }
    else
    {
ApplyEffectToObject (DURATION_TYPE_INSTANT, eEffect, oCloset);
    CreateObject(nObjectType,sTemplate,oLoc,TRUE);
    }

PlayVoiceChat(nVoiceChatID,GetNearestObjectByTag("goblin_rh",OBJECT_SELF)); // change this to your creature tag
AssignCommand(GetNearestObjectByTag("goblin_rh"), SetFacingPoint(GetPosition(oPC))); // change this to your creature tag
}

}