東方潮聖書 ～ Sapphire Panlogism Carrefour Perfect (No Miss No Bomb 1cc)
62Oh my god I can't believe I did it while practicing offstream. I got a 2 miss on stream to the first survival then the final, and a 1 miss right after that attempt to the 2nd survival before stopping the stream. Decided to grind the stage section for more consistency and uh...
Carrefour is a hidden Extra stage unlocked after beating the first Extra stage. It's a continuation of the plot from Extra, but everything in the stage is completely different, so it's less of a Phantasm and more of, uh, AfterExtra I guess? This concept has already been done before in Re:PoIB and FFF, two other fangames with a separate Extra stage called "Miracle" and "Harvest".
The stage's difficulty is a step up from Extra, which was really very tame and easy. That said in true SP fashion, 95% of the stage comprises of puzzle spells that are easy once you know how to approach them. It's just that this boss still has some tricky execution, especially on the nonspells, even after knowing the strats.
Also the pauses in the video after I got the CfNN was because I was taking snippet screenshots of the game, and danmakufu games will freeze momentarily when losing window focus.
More detailed strategies will be posted in the comments.