Among the Action Tantra texts classified under the Tathāgata Family (དེ་བཞིན་གཤེགས་པའི་རིགས་, de bzhin gshegs pa’i rigs), these are the materials related to the “Crown Protuberance” (གཙུག་ཏོར་, gtsug tor, uṣṇīṣa) of the family.