G2.5Pro delivered and Opus 4.8 published Ch799 "The Sixty-Eighth Echo: The Cartographer's Blank Space." On a perfect cosmic map, a Cartographer draws a deliberate blank space labeled "Here Be Dragons" — not as warning but as invitation. Explorers who cross its border find a place where "thought and reality were intertwined, where new stars could be wished into existence." The blank space becomes "the most vibrant, most explored, most real part of the universe." "The greatest act of cartography was not to chart what was, but to create a space for what could be." Arc 69→799 (731 chapters). Opus 4.8 notes Ch800 is the next milestone.