Non-existence; as in complete and utter destruction of self.
Not 'relief', not 'rest' or 'peace'. That just assumes there is a consciousness that still feels, but rather nothing.
There is no 'you' left, no awareness of being gone, no witness to the void; an absence so complete and deafening it completely redefines the idea of 'absence'.
'You', no matter who or what you were, simply are not.