The administrator of http://kaumarapayanam.blogspot.ru has posted revelations on the mysterious and mystical Sri Gnanaskandar Jeeva Nadi of a Skandar Upasagar at http://kaumarapayanam.blogspot.com/2015/03/26.html, and http://kaumarapayanam.blogspot.com/2015/03/27.html. Originally in Tamil, I have tried my best to translate portions of it into English.
The author says that each of us has taken a birth to relinquish our karmic baggage. But sadly we have forgotten the purpose and instead have engaged in increasing the karma.
The Siddhas have never let down the true genuine devotees who came surrendering to them. The Siddhas help them to sail through this birth, showing the means to reduce one's karma. All they expect from them is true devotion and a yearning for Erai, having themselves seen Erai.
The author introduces the Sri Gnanaskandar Jeeva Nadi. Besides Lord Murugan, Agathiyar, Sugar, Kagapujandar, and Patanjali appear and bless the seekers through this mystical Nadi.
He relates an episode from the Skandar Upasagar's life.
Once at 6 in the morning, the Skandar Upasagar was at prayer. Suddenly he heard a voice from within. “Son! Pick up the Jeeva Nadi and read it. I have a message for you”. But as he was in deep meditation he just could not come out of it. After half an hour he finally could pick up the Nadi. He could feel a vibration go through him. “Turn to the 8th olai or leaf and read it”, he was told.
A yellow light appeared in the olai. He could make out a small figure with a beard, carrying a kamandalam or staff, and a theerta sombu or drinking vessel. The light began to glow even more brighter. Agathiyar and Lord Murugan appeared together in that glow. Both Agathiyar and Lord Murugan insisted that the Skandar Upasagar reveal their coming in the light and write about it.
Agathiyar continued, "The Siddhas will reign under my leadership soon in this age of Kali. The signs are already there. People are suffering. People do not uphold moral and virtues. Natural calamities and new diseases will surface and will be a great challenge. We shall appear at certain places, in the Nadi in the form of light and without form too for the sake of true devotees. Similarly I shall appear and grace this nadi too if Lord Murugan wishes. We shall show ways to eradicate peoples karma through this nadi."