bool summon_shadows(int pow, bool god_gift, bool force_hostile,
                    bool quiet)
{
    bool success = false;
    // Maximum power is 300 (11 shadows).
    const int how_many = (pow / 30 + 1);
    if (!quiet)
    {
        mpr(how_many > 1 ? "Flickering shadows surround you."
                         : "A nearby shadow flickers.");
    }

    for (int i = 0; i < how_many; ++i)
    {
        int monster =
            create_monster(
                mgen_data(MONS_SHADOW,
                          !force_hostile ? BEH_FRIENDLY : BEH_HOSTILE,
                          2, you.pos(),
                          !force_hostile ? you.pet_target : MHITYOU,
                          (god_gift ? MG_GOD_GIFT : 0) | MG_FORCE_BEH));
        if (monster != -1)
        {
            success = true;
            player_angers_monster(&menv[monster]);
        }
    }
    return (success);
}