Hallo everyone. I have a question about the trophy 'Oblivion Walker''. Will I still get that trophy even when I dropped/sold the Daedric artifacts? Does the count still continue?

So long as you had them once, it counts. So you can sell them and drop them and because you had them, it counts.

Thanks

does this achievement carry over?

It has to be done in one playthrough, can't be done over time.

Oh and the Rueful Axe doesn't count towards the trophy.