// can't use beam variables here, because of monster_die and the puffs of smoke

    struct monsters *monster = 0;       // NULL {dlb}

    for (int ab = 0; ab < MAX_MONSTERS; ab++)

    for (int i = 0; i < MAX_MONSTERS; ++i)

        monster = &menv[ab];

        monsters* const monster = &menv[i];

    CARD_CRUSADE,

    CARD_SUMMON_ANIMAL, CARD_SUMMON_DEMON, CARD_SUMMON_WEAPON

    CARD_CRUSADE, CARD_SUMMON_ANIMAL, CARD_SUMMON_DEMON, CARD_SUMMON_WEAPON

    case CARD_CRUSADE: return "the Crusade";

static void crusade_card(int power, deck_rarity_type rarity)
{
    const int power_level = get_power_level(power, rarity);
    if ( power_level >= 1 )
    {
        // A chance to convert opponents.
        for ( int i = 0; i < MAX_MONSTERS; ++i )
        {
            monsters* const monster = &menv[i];
            if (monster->type == -1 || !mons_near(monster) ||
                mons_friendly(monster) ||
                mons_holiness(monster) != MH_NATURAL ||
                mons_is_unique(monster->type) ||
                mons_immune_magic(monster))
                continue;
            // Note that this bypasses the magic resistance
            // (though not immunity) check. Specifically,
            // you can convert Killer Klowns this way.
            // Might be too good.
            if ( monster->hit_dice * 35 < random2(power) )
            {
                simple_monster_message(monster, " is converted.");
                if ( one_chance_in(5 - power_level) )
                    monster->attitude = ATT_FRIENDLY;
                else
                    monster->add_ench(ENCH_CHARM);
            }
        }
    }
    abjuration(power/4);
}

    case CARD_CRUSADE:          crusade_card(power, rarity); break;