Mandarava accomplished the state of an immortal
(pure awareness holder.) in Maratika.

Wisdom Dakini Mandarava's
Achievement of Longevity in Maratika Cave

Then they went together to the maratika ,the sacred power spot where the outer,inner, and secret mandalas were complete in terms of perfect noble attributes this place was like a wish-fulfillng   jewel that surpasses any other sacred place in India  for the practice of spiritual  attainment. Guru and consort both  gave  rise to the mandala of  the  deity, and  the princess made this  offering to the vajra master: “In order to enter the secret path of the vajra mandala, I offer my own  body of great fortune as the mandala  offering.”
Thus offering her own body  and life, Mandarava  sang this song of supplication to the guru:  “Kye! O great pure awareness holder Padmasambhava , on this precious occasion, when you are about to bestow the empowerment of the precious secret path of the pure awareness holder, by  your kindness please confer the outer, inner, and  secret empowerments that ripen and mature:”
Then, from  the warmth of the great vajra master’s  forehead emerged the blessing that bestowed the vase empowerment.  In successive  order, he bestowed  the secret speech empowerment  that give rise to the development  of all noble qualities, the crystal mind empowerment that  arouses the essential  fluids,  and, in order to  reveal the essential nature  reality as it is, the absolute indication empowerment  of the mind. He  bestowed the empowerment of  empty ambrosia to purify the essential vital energies, the vajra mandala empowerment of the path of union practice, and the great secret empowerment of pure union practice. He bestowed   the empowerment  of the five primordial wisdoms to  liberate the five passion. He bestowed the  vajra master empowerment  to perfect the  state of becoming a pure  awareness holder.  Finally, he bestowed the initiation that  reveals  the pure path of  empowerment .
Having thus ripened from all the transmissions, mandarva obtained  the Nobel qualities necessary to perform the generation and completion  stage practices. After  practicing for three months, they received a clear vision of Buddha  of long life, Amitayus, and  accomplished the state of immortal pure awareness holder. The guru proclaimed that she was a  fortunate  upholder of pure awareness  and that in order to  eliminate any obstacles to their accomplishment, they  both  should practice  the deity Hayagriva. They practiced the Hayagriva  Mechar  cycle from the tantara  known  as the Great  play of the quintessential lotus   and the treasury of One Thousand  Essential  Instruction,  at  tantra on   the union of Hayagriva and Vajravarahi.  Following this, both guru and  consort had clear visions of  Hayagriva, whose neighing and sounding of hum  could be clearly heard around them thereafter. At this point, all possible demonic  and  obstructing  forces had been  banished . Mandarava compiled a treasury  of  more  than a thousand  extensive  and concese longevity methods, including essential pointing-out instructions. Both  guru and consort  became free from  the process of birth  old age , sickness , and death ,  until the end of this age  of ongoing existence. They appear in the embodiment of  rapture, from which they went on to accomplish  the secret practice of union.
When  the vajra  master manifested himself  in the form of the slightly wrathful guru of the Buddha family,  the princess followed accordingly.  By engaging  in the perfectly pure mandala of primordial wisdom, they discovered the primordial awareness of stainless miraculous display . they gained the ability to  transcend  the ordinary elements, with powers  that included leaving impressions on solid matter , rainbow  light displays, and  so  forth. Their enlightened  union naturally  caused flowers  to descend from the sky  and captivated and summoned those who were oath-bound guardians of the secret doctrine.  These  guardians were then  given the  task of ensuring  that the lineage of accomplishing longevity was secure. Even  the gods, nagas, and  the gods among humans and  their assemblies offered the essence of their life without  hesitation. The vajra master became known  as the Immortal  Padmasambhava, and Mandarava  as the dakini pure awareness holder of immortality 
Dungmen Karmo, Maiden of the White conch.

From the  Lives and Liberation
Of  the princess of Zahor, Mandarava,