I had an experience of true ego death only once on Salvia. In those brief moments, I did not know that I was a human person who just smoked some drug. My experience was completely foreign to me (like an observer that has no control of what I get to experience or feel). There is a brief moment where I thought, wow I just died. Only to have a wild experience that is hard/impossible to put into words for some unknown time. Eventually you do come back as 'you'. With all the memories you had before you smoked and a quickly diminishing recollection of the wild experience you just had. DMT is supposedly like that too but I never had a breakthrough experience on it yet.