Originally posted by The_Tempest
I do remember that Nihilus was, to borrow the KotOR Campaign Guide's words, "psychically starved." I do not understand what bearing that has on his durability. If what you say is true, it should have been independent of the effort, considering he survived Malachor V as a "man" and prior to his Sith training.
He was starved already when approaching Telos.
When he fed upon the Exile, he ended up exhausting nearly all of his energy - rendering him not much more than an animated suit of armor and robes.
- But back when Malachor V was ripped apart and everyone on it died - in that instant, his pain and anguish at the deafening destruction, warped his being into a Wound in the Force - and becoming that Wound, to begin with, fed him instantly with enough power to tank the blast.
In other words, as the destruction occurred, he became a hole - and all of that death, just sucked right into him.