The current problem is, what exactly is the "Heaven’s Mark."

Bai Pu looked around; the area surrounding the Catastrophe Abyss was filled with dense mist, allowing only a vague glimpse of the high walls formed by the distant seawater.

This layer of mist was quite viscous, and when Bai Pu extended his spiritual power outward, it encountered significant resistance, reaching only about a dozen meters, not as far as his eyesight.

Occasionally, shadows swam through the mist, their massive forms were awe-inspiring.

"Could these shadows be the powerful sea beasts of the Starfall Islands or mutated dragon species?"

Bai Pu fixed his gaze on one of the shadows and, with a few Gang Steps, dashed toward it through the air.

Soon, Bai Pu approached the shadow, and through the thinning mist, he could discern its true form.

This was a mutant beast resembling a catfish, yet it had a pair of long, transparent, membrane-like wings. It was about twenty meters long, with a massive head that looked like a heavy truck, and a slender, forked tail that flickered with arcs of electricity.

Most importantly, on the head of this catfish monster, a bright, mysterious script was flashing with light.

"Could this mysterious script be the ’Heaven’s Mark’?"

A sense of absurdity filled Bai Pu’s mind; the mysterious script appeared ancient and simplistic, yet Bai Pu couldn’t recall its appearance after looking away. 𝒻𝓇𝑒𝘦𝘸𝑒𝒷𝓃ℴ𝑣𝘦𝑙.𝒸ℴ𝘮

Bai Pu had encountered this type of script before, clearly the "Rune Characters" as referred to by the Divine Envoy, what Gaia’s Will called the "Divine Script"!

Moreover, judging by the light, this Divine Rune contained energy, just like those produced in the Lost City of the Original Sin World.

"Gaia’s Will is actually being lazy, renaming the Divine Script to Heaven’s Mark. In this sense, having participants compete for the complete Heaven’s Mark is essentially collecting a string of Divine Script."

Bai Pu further speculated that the Divine Script here should be scattered among the monsters in the Catastrophe Abyss.

In the Lost City of the Original Sin World, to acquire a Divine Rune, one must defeat monsters born from Genesis Energy.

Then how does one acquire the Divine Script in the Catastrophe Abyss? The answer seemed imminent.

The winged catfish monster, upon seeing Bai Pu, launched an attack, its massive body spinning like a top and charging straightforwardly at Bai Pu.

However, during this charge... Bai Pu found himself unable to dodge!

The rapidly spinning body seemed to resonate with some mysterious trajectory between heaven and earth, compressing the surrounding mist inward. Initially only slightly viscous, the mist now felt like cotton, firmly pinning Bai Pu at the center.

Boom!

The winged catfish collided with Bai Pu’s Dark Gold Tower Shield.

[You took 94 points of recoil damage.]

Just as Bai Pu felt indifferent, a surge of current abruptly pierced through the shield’s protection, delivering a solid electric shock to Bai Pu.

Bai Pu’s entire body went numb momentarily, even hindering the flow of his Demon Fighting Qi, causing him to plummet rapidly.

Thankfully, Bai Pu had pre-prepared Magic Sand; with a slight mental effort, a small amount of magical power manipulated the Magic Sand to form an invisible hand, supporting Bai Pu’s body.

[Your skill: Sand of Refinement has been upgraded to Level 6.]

[Based on your title: Limit Breaker, the level of Sand of Refinement is Level 7. You can preemptively draw Level 7 skill special effects.]

Bai Pu’s thoughts raced, multitasking as he dodged the winged catfish’s consecutive attacks while swiftly browsing through the special effects.

[A, Blessing of Fertility: Increases the storage limit of your Sand of Refinement by 50%.]

[B, Tidal Sand: Tide Mystical Arts special effect, the power of Sand of Refinement undergoes cyclic variation, with peak power increased by 50%, and trough power decreased by 50%.]

[C, Sand Binder: Genetic Fusion Talent Effect, Sand of Refinement transforms into a sand-binding shell, binding the remnant souls within dead strong individuals’ genetic fragments to fight for you.]

[D, Scorching Sand: Red Flame Mystical Arts special effect, when Sand of Refinement is used in attack, it will inflict a continuous flame burn effect on enemies causing ongoing fire damage.]

[E, Sand Seal: Use Sand of Refinement to imprison an enemy, causing them to enter a long-term feign death state. The target must either be significantly weaker than you or severely injured and unable to resist.]

[F, Desert Storm: Gang Wind Mystical Arts special effect, using Sand of Refinement to conjure a large-scale sandstorm; enemies within the area will endure ongoing wind and earth mixed attribute magical damage, with those upwind severely slowed.]

Bai Pu had trained in four Mystical Arts, revealing the benefits clearly; reaching a critical skill level unlocked numerous Mystical Arts special effects at once, providing Bai Pu with options to choose from.

"Option A, Blessing of Fertility’s increase in capacity is unnecessary, as I can only manipulate ten portions of Magic Sand at a time! Level 7 Magic Sand already has a limit of 100 portions, sufficient in most scenarios;

"Option B, Tidal Sand’s unstable power excludes it; Option D, Scorching Sand’s effect is minimal, Option E, Sand Seal has too many restrictions, Option F, Desert Storm overlaps in functionality, all excluded."

Bai Pu ultimately chose Option C: Sand Binder.

Honestly speaking, choosing special effects often involves gambling because when selecting a special effect, only a general description is visible; detailed information only becomes available afterward.

Bai Pu decided on Sand Binder mainly because the Genetic Fusion Talent Effect might synergize with one of the Talent Skills of the Heart of Evolution, ensuring it wouldn’t be underwhelming.

Bai Pu went from browsing the special effects to finalizing his choice in the blink of an eye.

The winged catfish’s attack was still in its second round, and Bai Pu easily evaded using Gang Steps.

Bai Pu wished to experiment with the new special effect and, with that thought, ten portions of Magic Sand surged out. Simultaneously, a genetic fragment stored within Bai Pu’s talent was activated, and a strong soul remnant fused with it.

The Magic Sand, transformed by the strong soul remnant, ultimately formed a slim, elongated shell, its facial features slightly blurred but resembling a "Bound" figure overall.

Bai Pu furrowed his brow slightly; the attributes of this "Sand Binder" were immediately visible to him, with a highest Spirit of just over 100 points, while other attributes were unremarkable.

In terms of attributes, the Sand Binder was equivalent to about a Level 7 Warrior, significantly different from the original Bound entity.

The only highlight lay in the Sand Binder’s ability to perform some of the strong soul remnant’s noteworthy skills; for example, this remnant-made Sand Binder could use the ability of [Black Rope Hell] for area control.

However, the Professional Energy Strength of the Sand Binder is far inferior to the original Bound entity, and its [Black Rope Hell] priority is estimated to be at a warrior level, far from being as formidable as the original.

When it comes to taking hits, the Sand Binder is not afraid of getting damaged since it’s not made of flesh and blood and has no vital points.

Even if the sand-binding shell is damaged, Bai Pu can replace it with new Magic Sand to repair it.

"Though, I’ve conceived some new tactics, which can be tested on this big catfish."