Has Harry read about Koschei the Deathless? He does know about liches. Chapter 94 initially contained the line:
Obvious problem 1, the Dark Lord is supposed to have made his horcrux in 1943 by killing whatshername and framing Mr. Hagrid.
which was edited a few hours after posting to:
Obvious problem 1, the Dark Lord is supposed to have made his lich-phylactery-thingy in 1943 by killing whatshername and framing Mr. Hagrid.
Has Harry read about Koschei the Deathless? He does know about liches. Chapter 94 initially contained the line:
which was edited a few hours after posting to: