특정 아이템 사용시 몬스터 즉사

 int rand = (int) Math.floor(Math.random() * 100) + 1;
                if (player.getInventory(MapleInventoryType.EQUIPPED).findById(아이템코드) != null) {
                    if (!monster.stats().isBoss()) {
                        if (rand > 0 && rand <= 50) {
                            player.getMap().broadcastMessage(MaplePacketCreator.killMonster(monster.getObjectId(), true), monster.getPosition());
                            player.gainExp(monster.getExp() * ChannelServer.getInstance(player.getClient().getChannel()).getExpRate(), true, false);
                            player.dropMessage(5, "특정 아이템의 효과로 몬스터가 즉사하였습니다.");
                        }
                    }
                }