Unsurpassable Yoga Tantras
Highest tantra class — Father, Mother, Non-Dual.
5 texts
Cakrasaṃvara Tantra
Mother Tantra — root of Kagyu, especially Marpa and Milarepa.
Guhyasamāja Tantra
Supreme FATHER Tantra — 'king of tantras' in Tibet.
Hevajra Tantra
Supreme MOTHER Tantra — root of the Sakya lineage.
Kālacakra Tantra
Non-Dual Tantra — astronomy, medicine, spirituality. Central to Dalai Lama's teachings.
Vajrabhairava Tantra
Wrathful tantra — Yamāntaka, Slayer of Death.