Build.c:

char *	const	o_flags	[] =
{
"glow", "hum", "dark", "loyal", "evil", "invis", "magic", "nodrop", "bless",
"antigood", "antievil", "antineutral", "noremove", "inventory",
"antihuman", "antifighter", "antifircedemon", "antifiredemon", "organic", "metal",
"donation", "clanobject", "clancorpse", "antifoxdemon", "antispiritdet", 
"hidden", "poisoned", "covering", "deathrot", "buried", "prototype", 
"nolocate", "groundrot", "lootable", "antispirithm", "antiwarrior"
};

mud.h:

typedef enum
{
  ITEM_GLOW, ITEM_HUM, ITEM_DARK, ITEM_LOYAL, ITEM_EVIL, ITEM_INVIS, ITEM_MAGIC, 
  ITEM_NODROP, ITEM_BLESS, ITEM_ANTI_GOOD, ITEM_ANTI_EVIL, ITEM_ANTI_NEUTRAL, 
  ITEM_NOREMOVE, ITEM_INVENTORY, ITEM_ANTI_HUMAN, ITEM_ANTI_FIGHTER, 
  ITEM_ANTI_FIRCE_DEMON, ITEM_ANTI_FIRE_DEMON, ITEM_ORGANIC, ITEM_METAL, ITEM_DONATION, 
  ITEM_CLANOBJECT, ITEM_CLANCORPSE, ITEM_ANTI_FOX_DEMON, ITEM_ANTI_SPIRIT_DET, 
  ITEM_HIDDEN, ITEM_POISONED, ITEM_COVERING, ITEM_DEATHROT, ITEM_BURIED, 
  ITEM_PROTOTYPE, ITEM_NOLOCATE, ITEM_GROUNDROT, ITEM_LOOTABLE, ITEM_ANTI_SPIRIT_HM,
  ITEM_ANTI_WARRIOR,
  MAX_ITEM_FLAG
} item_extra_flags;

act_obj.c:
    if ( !IS_IMMORTAL(ch)
    &&  (( IS_OBJ_STAT(obj, ITEM_ANTI_HUMAN)
        && ch->class == CLASS_HUMAN					)
    ||   ( IS_OBJ_STAT(obj, ITEM_ANTI_FIGHTER)
        && ch->class == CLASS_FIGHTER					)
    ||   ( IS_OBJ_STAT(obj, ITEM_ANTI_FIRCE_DEMON)
	&& ch->class == CLASS_FIRCE_DEMON					)
    ||   ( IS_OBJ_STAT(obj, ITEM_ANTI_FIRE_DEMON)
	&& ch->class == CLASS_FIRE_DEMON					)
    ||   ( IS_OBJ_STAT(obj, ITEM_ANTI_FOX_DEMON)
	&& ch->class == CLASS_FOX_DEMON					)
    ||   ( IS_OBJ_STAT(obj, ITEM_ANTI_SPIRIT_DET)
	&& ch->class == CLASS_SPIRIT_DET					)
    ||   ( IS_OBJ_STAT(obj, ITEM_ANTI_SPIRIT_HM)
	&& ch->class == CLASS_SPIRIT_HM					)
    ||	 ( IS_OBJ_STAT(obj, ITEM_ANTI_WARRIOR)
	&& ch->class == CLASS_WARRIOR					)) )
    {
	act( AT_MAGIC, "You are forbidden to use that item.", ch, NULL, NULL, TO_CHAR );
	act( AT_ACTION, "$n tries to use $p, but is forbidden to do so.",
	    ch, obj, NULL, TO_ROOM );
	return;
    }

handler.c:

    if ( xIS_SET(*extra_flags, ITEM_ANTI_HUMAN)	) strcat( buf, " anti-human"    );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_FIGHTER) ) strcat( buf, " anti-fighter"   );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_FIRCE_DEMON) ) strcat( buf, " anti-firce-demon" );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_FIRE_DEMON) ) strcat( buf, " anti-fire-demon"  );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_FOX_DEMON)	) strcat( buf, " anti-fox-demon"   );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_SPIRIT_DET)) strcat( buf, " anti-spirit-det" );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_SPIRIT_HM) ) strcat( buf, " anti-spirit-hm"  );
    if ( xIS_SET(*extra_flags, ITEM_ANTI_WARRIOR) ) strcat( buf, " anti-warrior"   );