C1726 Sword heart's method!
Tang Huan was a bystander, while Jianxin was a spectator.
Her method was very simple, it was Tang Huan using her soul to condense the "Puppet Soul Seal".
She was the spirit of the cave, and she did not need to face danger the way cultivators did, so she did not need to worry about the shackles within her soul causing the laws of the world to backlash