Complex sentence: The theme of Shiva as a beggar is not unique to the Bhikshatana icon and his legends, but the theme of the expiatory wandering--which is the core of the Bhikshatana tale--lies in the Kapalika and Pashupata sects.
Split into simpler sentences: The theme of Shiva as a beggar is not unique to the Bhikshatana icon and his legends. Shiva is often described as a beggar, but the theme of the expiatory wandering--which is the core of the Bhikshatana tale--lies in the Kapalika and Pashupata sects.