Many Mahasiddhas practiced specific tantras, for example Brahman Kukkuripa (34th in Abhyadatta's list) of Kapilaśakru practiced Cakrasaṃvara Tantra, Monk Virūpa (3) of Somapuri practiced Hevajra for 12 years, Monk Karṇaripa (Aryadeva) (18) of Nālandā practiced Guhyasamāja.