The old (unnerfed) version of 7D With Single Dash by fishtank_underflow, modifying the original 7D by Monika523. This is the first map on the hardlist I've played. It was really enjoyable; there are a lot of clever designs in these screens built out of simple mechanics. The final death count was 50369.
I used save states for practice only; each checkpoint was cleared legit.
The map: https://gamebanana.com/mods/150350
Celeste Hardlist (Celeste's Hardest Maps Clear List): https://docs.google.com/spreadsheets/...