But this killing business can be done without the presence of Kṛṣṇa. Because there are so many natural forces, war, pestilence, famine. Anything. Just set on working. Millions of people can be killed. So Kṛṣṇa does not require to come here to kill these rascals. They can be killed simply by Kṛṣṇa's direction, nature's law. Prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27). Sṛṣṭi-sthiti-pralaya-sādhana-śaktir ekā (Bs. 5.44). The nature has got so much power that it can create, it can maintain, it can annihilate, dissolute, everything. Nature is so powerful.
Sṛṣṭi-sthiti-pralaya. Sṛṣṭi means creation and sthiti means maintenance and pralaya means destruction. These three things nature can do. Just like this creation, material creation is natural, nature, cosmic manifestation. It is being maintained. By nature's mercy, we are getting sunlight, we are getting air, we are getting rains and thereby we are growing our food, eating nicely, growing nicely. This maintenance also being done by nature, But at any time everything can be finished simply by one strong wind. Nature is so powerful. So for killing these demons, nature is already there. Of course, nature is working under the direction of Kṛṣṇa. Mayādhyakṣeṇa prakṛtiḥ sūyate sa-carācaram (BG 9.10). So if Kṛṣṇa says that these demons may be killed, then nature's one blast, one strong wind will, can kill millions of them.