All this is for the destruction of the Rākşasas. At the fated time, those that are in the clutches of Death, have their stars afflicted by the planets.
सर्वं चैतद्विनाशाय राक्षसानामुपस्थितम्। काले कालगृहीतानां नक्षत्रं ग्रहपीडितम्॥