Complex sentence: It is not clear how old Wild is, but he is preoccupied with his own death and sets about obliterating himself from the toes upwards through meditation-a sort of deliberate self-inflicted self-erasure.
Split into simpler sentences: It is not clear how old Wild is, but he is preoccupied with his own death and sets about obliterating himself from the toes upwards through meditation. A sort of deliberate self-inflicted self-erasure.