Izanagi simply stabbed the concept of downhill.
The spear's point pierced the immortal's technique at its philosophical core, rewriting the fundamental assumption on which it was based. Suddenly, downhill became a matter of personal choice rather than gravitational inevitability. The manifested water began flowing upward, sideways, and in several directions that required non-Euclidean geometry to properly describe, all while maintaining perfect liquid cohesion and behaving exactly as water should behave once one accepted that "should" was a far more flexible concept than most gods realised.
The immortal stared at her rebellious technique with the expression of someone whose entire worldview had just filed for divorce and moved out while she wasn't looking. "That's... that's not how physics works."
