As an undead, Snowblind is resistant to most diseases, telepathic probes, and simpler magics, but not to focused mystic attacks like the Penance Stare.
As an undead, Snowblind is resistant to most injuries and diseases. He has proven immune to the telepathic powers of Darklove and resistant to certain simple magics, but not to focused mystic attacks like Blackheart or the Penance Stare.