The core prohibition of the Holy Energy Divine Heart Spell lay within Lu Nianxin’s Heart Meridian, containing two types of Heaven and Earth Rules. Even Ye Lanfeng’s Holy Emperor Sword Energy could not independently unravel it; it required the assistance of Fen Qianji’s Divine Heart Sacrificial Technique.

Once this prohibition was broken, the Qi Sea and meridians would undergo significant shocks. Yan Zishu had to guard with all his might; otherwise, even if the Forbidden Technique was eventually broken, Mu Nianxin would still end up as a cripple.

Thus, the heavy responsibility of protecting the Heart Meridian could only be entrusted to Mu Hanyan and Doctor Sun.

A strong golden light burst forth from the position of Lu Nianxin’s Heart Meridian, precisely the Holy Emperor Sword Energy of Ye Lanfeng.

Lu Nianxin trembled violently, and above the Heart Meridian, a dazzling array of colorful light emerged, converging into numerous tiny Light and Shadow Runes, intricately linked like an array.

Under the colorful glow of these Light and Shadow Runes, even Mu Hanyan and others felt their Qi within become extremely unstable, fluctuating between strong and weak, high and low. Clearly, this array was the core of the Holy Energy Divine Heart Spell.

The colorful light and the golden sword energy clashed violently. Ye Lanfeng took a slight step back; the Holy Energy Divine Heart Spell contained two different Powers of Laws, almost too overwhelming even for Ye Lanfeng to withstand.

Fen Qianji flipped his palm and performed a handprint full of mysterious aura.

The golden sword energy and the mysterious handprint pressed simultaneously on the Holy Energy Divine Heart Spell, causing the colorful light to flicker and fade under the joint suppression of Ye Lanfeng and Fen Qianji.

However, the powerful force created by the collision of various Powers of Laws surged toward Lu Nianxin’s Heart Meridian.

For the Mu Family’s Disciples cultivating the Heavenly Heart Technique, the Heart Meridian is the most fatal, but its defensive power is relatively stronger. For other cultivators, the Heart Meridian is not only fatal but also fragile. Once this force enters the Heart Meridian, Lu Nianxin will surely die.

Doctor Sun dared not neglect, his fingertip techniques moved through the air to protect her Heart Meridian.

One cannot deny that the finger techniques within the Sun family’s medical skills are extraordinary. If it were anyone else, any slight mistake would mean that even if Lu Nianxin didn’t die from that mighty force, she would perish from his finger techniques. However, his techniques are exquisitely brilliant, with control over Qi refined to the utmost precision. Stopping just short of the Heart Meridian, he could maximally block the force’s impact without causing any harm to Lu Nianxin’s Heart Meridian.

Unfortunately, despite his exceptional medical skill, his cultivation was somewhat lacking. Just one impact scattered most of his gathered Qi.

"Careful!" Yan Zishu cried out in alarm.

Night Lanfeng and Fen Qianji’s expressions also changed slightly. They did not expect the force to be so powerful.

Although Huayue and others could not sense the change within Lu Nianxin, hearing Yan Zishu’s exclamation and seeing the changes on Ye Lanfeng and Fen Qianji’s faces, they knew the situation was dire, their hearts in their throats. Zhu Xiuqing was so tense he almost fainted on the spot.

Doctor Sun himself was pale, drenched in cold sweat.

At this moment, a fair finger extended and hovered above Lu Nianxin’s Heart Meridian.

The one who struck was naturally Mu Hanyan. Originally, she intended to follow Doctor Sun’s method, pointing her finger through the air with exquisite finger techniques to control the Qi and protect her grandmother’s Heart Meridian. Seeing the overwhelming power of the force, however, she realized that even with the strength of a Great Sword Master, she couldn’t withstand it.

Thus, Mu Hanyan anchored her finger on Lu Nianxin’s Heart Meridian, continually infusing Qi into her meridians, pooling outside them. Only this way could the power of the Qi be maximized.

However, this meant that the mastery of the finger techniques couldn’t be fully utilized, so she had to control the flow and strength of the Qi herself. Remember, this is the most critical Heart Meridian. For anyone else, this approach would be more harmful than helpful, but Mu Hanyan was different. She possessed the Divine Martial Refining Soul Technique, making her Divine Sense several times stronger than an ordinary Sword Saint. Even without the Meridian Blocking Finger, her control over the Qi matched Doctor Sun’s.

Still, as she extended her finger, Mu Hanyan glanced at Huayue and the others. Huayue nodded knowingly, forming sword moves with their hands, preparing to deploy the Sword Array.

If even Mu Hanyan’s current strength couldn’t withstand the force, they would activate the Sword Array, combining the strength of the four to forcibly elevate Mu Hanyan to the Sword Saint Realm.

This was Mu Hanyan’s greatest reliance.

Yet, this method of enhancing strength was too taxing on the Qi. Considering Wu Tianxiong would likely act tomorrow, likely triggering a major battle, Mu Hanyan was reluctant to exhaust her trump card too soon.

The massive force surged again, and the colorful light was even stronger than before, signifying even greater power this time.

Everyone watched Mu Hanyan tensely, unsure if her Great Sword Master strength could withstand such might, and if so, whether she could withstand it next time.

Mu Hanyan focused entirely, concentrating all her Divine Sense into Lu Nianxin’s Heart Meridian. Just then, a sword light emerged between her fingers.

The sword was only finger-sized, ancient in style, extremely exquisite, yet exuded a distinct charm and an unmatched might that seemed capable of slicing through the heavens.

Heart Protecting Divine Sword! Mu Hanyan watched the sword light in her hand in surprise. Was this not the Heart Protecting Divine Sword hidden within the Heart Meridian!

Recently, when absorbing the Heavenly Star Power from the Heavenly Destiny Star Plate at Sword Sound Academy, Mu Hanyan relied on this Heart Protecting Divine Sword to steadfastly guard her Heart Meridian. However, she couldn’t control it then and ultimately relied on Star Illusion Thousand Machine’s full force Divine Thought Power to shear through that tremendous Heavenly Star Power.

Now, this Heart Protecting Divine Sword unexpectedly appeared between her fingers as if guided by an unseen hand.

"Nine Heavens Star Fall!" Raiding the terrifying power of the Holy Energy Divine Heart Spell surging like a tide, Mu Hanyan instinctively whispered.

A sword light burst forth, so bright it was blinding.

Where the sword light passed, the colorful light of the Holy Energy Divine Heart Spell melted away like ice under a scorching sun. In just the blink of an eye, that dreadful force vanished.

Everything happened too fast, too fast for everyone to process.

Everyone looked at Mu Hanyan in astonishment, almost doubting their eyes.

That force was so immense, even Ye Lanfeng and Fen Qianji couldn’t suppress it, and Mu Hanyan effortlessly shattered it all, leaving nothing behind.