Dear friends,
few years ago, I gave a series of teachings on the 10 natures or 10 absences (actually, on 8 out of 10). It is based on the root tantra of Dzogchen Semde "All-Creating King" (see "The Supreme Source" by Chogyal Namkhai Norbu and Adriano Clemente as well as Jim Valby's translation). It is a very important and interesting part of the Dzogchen teaching clarifying both the point of view and typical mistakes which are common among Vajrayana tantra practitioners.
The whole archive is
HERE.
Those who are seriously interested in Dzogchen Semde meditation and contemplation can join in person retreat on May 1-8, in Merigar East (Romania) on a Black Sea coast.
Stay well!
Igor