He really did just that, ignoring the extreme danger of putting himself in a state where he could die at any moment. The immense impact of magic power almost caused his meridians to collapse instantly. If not for the protection of the nine Lifeforce Earth Red Lotus Seeds, he would have already perished under that violent magical assault.
If Ji Dong had been able to remain calm at the time, he would never have made the foolish decision to fully open all his meridians. Not to mention anything else, just think about how much magic power the Fire God Sword absorbed from the Heavenly Jade during its evolution—it was easy to imagine the terrifying strength it would possess post-evolution. Fortunately, the nine Lifeforce Red Lotus Seeds protected him, pulling Ji Dong back from the gates of death and allowing his magic power to instantly break through to the Nine Crown stage.
