if (pow > 50 || (pow > 25 && one_chance_in(3))
                || (get_ammo_brand(you.inv[weapon]) == SPMSL_POISONED
                    && random2(100) < 43))

            if (one_chance_in(5 - std::min(4, div_rand_round(pow * 2, 25)))
                || get_ammo_brand(you.inv[weapon]) == SPMSL_POISONED)

                mon = MONS_SNAKE;

                mon = random2(100) < pow / 3? MONS_BROWN_SNAKE : MONS_SNAKE;

/* int mons_place( int mon_type, beh_type behaviour, int target, bool summoned, */
/*                 int px, int py, int level_type = LEVEL_DUNGEON, */
/*                 proximity_type proximity = PROX_ANYWHERE, */
/*                 int extra = MONS_PROGRAM_BUG, */
/*                 int dur = 0, bool permit_bands = false ); */

/* int create_monster( int cls, int dur, beh_type beha, int cr_x, int cr_y, */
/*                     int hitting, int zsec, bool permit_bands = false, */
/*                     bool force_place = false, bool force_behaviour = false, */
/*                     bool player_made = false ); */

    // int &id, int mon_type, int power, beh_type behaviour,
    //                 int target, bool summoned, int px, int py, bool allow_bands,
    //                 proximity_type proximity = PROX_ANYWHERE,
    //                 int extra = MONS_PROGRAM_BUG, int dur = 0,
    //                 unsigned mmask = 0 );