void ugly_thing_energy_mutate(monsters *ugly);
bool ugly_thing_proximity_mutate(monsters *ugly);

    }
    return (false);
}
void ugly_thing_energy_mutate(monsters *ugly)
{
    simple_monster_message(ugly,
        " draws power from the mutagenic energy and changes!");
    ugly->uglything_mutate();
}
bool ugly_thing_proximity_mutate(monsters *ugly)
{
    if (one_chance_in(10))
    {
        int mutate_chance = 0;
        for (radius_iterator ri(ugly->pos(), 1); ri; ++ri)
        {
            monsters *ugly_near = monster_at(*ri);
            if (ugly_near == NULL || ugly_near == ugly)
                continue;
            if (ugly_near->type == MONS_UGLY_THING
                || ugly_near->type == MONS_VERY_UGLY_THING)
            {
                if (coinflip())
                    mutate_chance++;
                if (ugly->type == MONS_UGLY_THING
                    && ugly_near->type == MONS_VERY_UGLY_THING)
                {
                    if (coinflip())
                        mutate_chance++;
                }
            }
        }
        if (!one_chance_in(mutate_chance + 1))
        {
            simple_monster_message(ugly,
                " draws power from its mutagenic kin and changes!");
            ugly->uglything_mutate();
            return (true);
        }

    case MONS_UGLY_THING:
    case MONS_VERY_UGLY_THING:
        // A (very) ugly thing's proximity to others of its kind can
        // mutate it into a different (very) ugly thing.
        used = ugly_thing_proximity_mutate(monster);
        break;

        simple_monster_message(this, " mutates!");
        uglything_mutate();

        ugly_thing_energy_mutate(this);