int weap_eff = (is_random_artefact(weap)) ?
                       randart_wpn_property(weap, RAP_BRAND) :
                       weap.special;

            || weap.special == SPWPN_VAMPIRICISM
            || weap.special == SPWPN_PAIN
            || weap.special == SPWPN_DRAINING);

            || weap_eff == SPWPN_VAMPIRICISM
            || weap_eff == SPWPN_PAIN
            || weap_eff == SPWPN_DRAINING);