extern bool set_shield(player_type *creature_ptr, TIME_EFFECT v, bool do_dec);
extern bool set_tsubureru(player_type *creature_ptr, TIME_EFFECT v, bool do_dec);
extern bool set_magicdef(player_type *creature_ptr, TIME_EFFECT v, bool do_dec);
extern bool set_shield(player_type *creature_ptr, TIME_EFFECT v, bool do_dec);
extern bool set_tsubureru(player_type *creature_ptr, TIME_EFFECT v, bool do_dec);
extern bool set_magicdef(player_type *creature_ptr, TIME_EFFECT v, bool do_dec);