Anyway, it is an instruction manual not an empowerment?
Yes it is. It's a "triyik" (khrid-yig), instruction manual.
Also do you know what the "seven groups of Dharma protectors" are in the last empowerment (Ekajati) of volume 2?
They are the Damchen Dedun (dam-can sde-bdun), the seven oath-bound deities : 1. Maning Nakpo, 2. Ekadzati, 3. Remati, 4. Shenpa Sodrup, 5. Zadü Rahula, 6. Dorje Lekpa, and 7. Nödjin Marnak.
Thank you so much mutsuk! Do you know which text in the DamNgak contain the Longde empowerment because I am sure we got one? Here are the texts that seems to be about Longde in vol 1;
15. The selection of the root texts of Long-de teachings of Dzogpa Chenpo. Author: Need to check pp 379-394
16. The sadhana of the elaborate meditation on the Lama from Dzogchen Long-de Dorje Zampa called "The stream of Wisdom". Author: Jamgon Kongtrul Lodro Thaye pp 395-416
17. The instruction manual of the meditation according to the precious oral instructions of Long-de Dorje Zampa. Author: Shamar Chennga Chodrak pp 417-440
18. The sadhana of the four yogas of Long-de Dorje Zampa and Heruka Ngon Zog Gyalpo called "The Ocean of Wisdom"; Author: Jamgon Kongtrul Lodro Thaye pp 440-478
There are 2 sadhanas there, ever heard about a translation?