About such a man's attainment of a second body the only cause is his accidental death. There is no second cause. That new body which embodied creatures obtain, comes into existence and becomes attached to Rudras and Pishachas.
द्वितीयं कारणं तत्र नान्यत् किंचन विद्यते। तद् देहं देहिनां युक्तं पञ्चभूतेषु वर्तते॥