Karsey Kongtrul - a great master of the ultimate realization

This great master, also known as Palden Khyentse Oser, received a special command from his father the 15th Karmapa to focus on the practice of Mahamudra and reached an exceptionally high level of realization, which he briefly mentions to Tulku Urgyen Rinpoche in Blazing Splendor. http://rangjung.com/authors/Karsey_Kongtrul.htm

Karsey Kongtrul once told me that he had performed a drubchen three times using the treasure Tukdrub Barchey Kunsel, and each time, without fail, there were special signs. “Please tell me what they were,” I asked.
“Once a profuse amount of nectar poured forth, very sweet and slightly sour like excellent chang; it flowed from the torma on the shrine all the way to the entrance of the temple. Another time, the liquid in the amrita and rakta vessels on the shrine began to boil, sounding like roiling water, and rays of rainbow light surrounded the shrine inside the assembly hall, extending to the farthest walls, for all two or three hundred participants to see. The third time we also prepared sacred medicine and its sweet fragrance could be smelled seven days’ walk away. In my whole life I have never witnessed signs as amazing as during those three times.
“If you want to ensure having extraordinary indications and signs, then the Tukdrub is outstanding,” Karsey Kongtrul said.
All this could also have been due to the combination of the profound terma teaching and such an extremely great master. “Wouldn’t these signs also have something to do with you being present?” I asked.
“How special am I compared to the Lotus-Born? Tukdrub is the method for realizing his mind. I am quite happy to have seen only a few tiny signs of his greatness.”