void main()
{
    // 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, "towerofangarngit") == OBJECT_INVALID )
        return;

    // Destroy objects (not fully effective until this script ends).
    DestroyObject(GetObjectByTag("sltent3"));
    DestroyObject(GetObjectByTag("sltent2"));
    DestroyObject(GetObjectByTag("sltent1"));
    DestroyObject(GetObjectByTag("SacksofFlourGrainetc3"));
    DestroyObject(GetObjectByTag("SacksofFlourGrainetc2"));
    DestroyObject(GetObjectByTag("SacksofFlourGrainetc1"));
}