}
// Find a nearby monster to banish and return its index,
// including you as a possibility with probability weight.
static int choose_random_nearby_monster(int weight)
{
    int mons_count = weight;
    int result = NON_MONSTER;
    int ystart = you.y_pos - 9, xstart = you.x_pos - 9;
    int yend = you.y_pos + 9, xend = you.x_pos + 9;
    if ( xstart < 0 ) xstart = 0;
    if ( ystart < 0 ) ystart = 0;
    if ( xend >= GXM ) xend = GXM;
    if ( ystart >= GYM ) yend = GYM;
    /* monster check */
    for ( int y = ystart; y < yend; ++y )
        for ( int x = xstart; x < xend; ++x )
            if ( see_grid(x,y) && mgrd[x][y] != NON_MONSTER )
                if ( one_chance_in(++mons_count) )
                    result = mgrd[x][y];
    return result;

    // swap between you and another monster

    // Swap between you and another monster.
    // Don't choose yourself unless there are no other monsters
    // nearby.
    const int mon_to_swap = choose_random_nearby_monster(0);
    if ( mon_to_swap == NON_MONSTER )
    {
        mpr("You spin around.");
    }
    else
    {
        monsters& mon = menv[mon_to_swap];
        const coord_def newpos = menv[mon_to_swap].pos();
        // pick the monster up
        mgrd[mon.x][mon.y] = NON_MONSTER;
        mon.x = you.x_pos;
        mon.y = you.y_pos;
        // plunk it down
        mgrd[mon.x][mon.y] = mon_to_swap;
        // move you to its previous location
        you.moveto(newpos);
    }

    // pick a random monster nearby to banish
    int mons_count = 1;         // you
    int mon_to_banish = NON_MONSTER;
    int ystart = you.y_pos - 9, xstart = you.x_pos - 9;
    int yend = you.y_pos + 9, xend = you.x_pos + 9;
    if ( xstart < 0 ) xstart = 0;
    if ( ystart < 0 ) ystart = 0;
    if ( xend >= GXM ) xend = GXM;
    if ( ystart >= GYM ) yend = GYM;

    // pick a random monster nearby to banish (or yourself)
    const int mon_to_banish = choose_random_nearby_monster(1);

    /* monster check */
    for ( int y = ystart; y < yend; ++y )
        for ( int x = xstart; x < xend; ++x )
            if ( see_grid(x,y) && mgrd[x][y] != NON_MONSTER )
                if ( one_chance_in(++mons_count) )
                    mon_to_banish = mgrd[x][y];

    {

    }

    {

    }

    // not implemented yet

    // not yet implemented

    divine_retribution(static_cast<god_type>(random2(NUM_GODS)));

    divine_retribution(static_cast<god_type>(random2(NUM_GODS-1) + 1));

    case CARD_SUMMON_ANIMAL: break;
    case CARD_SUMMON_WEAPON: break;
    case CARD_SUMMON_ANY: break;

    case CARD_SUMMON_ANIMAL: break; // not yet implemented
    case CARD_SUMMON_WEAPON: break; // not yet implemented
    case CARD_SUMMON_ANY: break; // not yet implemented