void main()
{
    object oActor;

    // Get the creature who triggered this event.
    object oPC = GetEnteringObject();

    // Only fire for (real) PCs.
    if ( !GetIsPC(oPC)  ||  GetIsDMPossessed(oPC) )
        return;

    // Abort if the PC does not have the item "towerofangarngit".
    if ( GetItemPossessedBy(oPC, "fangsofmog") == OBJECT_INVALID )
        return;

    // Have "Grilli" strike up a conversation with the PC.
    oActor = GetNearestObjectByTag("grilli3", oPC);
    AssignCommand(oActor, ActionStartConversation(oPC, ""));
}