Until you define what the "You" is there is not a whole lot to discuss... Buddhism refers to the Atman. The atman refers to the real self beyond ego or false self. It is often referred to as 'spirit' or 'soul' and indicates our true self or essence which underlies our existence. the way the East looks at self is totally different to the ideas proliferating the West. Ego refers to memories/ attachments / vanity / fears, etc... The true self has no ego... thus "Slaying the ego" is about becoming your Atman. (true self) only if you use an adulterated and made up version of what the self is.. So like I suggested until you actually discuss what it is that is being reincarnated we are potentially at cross purposes.