The coral like Immortal herb was decently big though, being about thirty centimeters in size with multiple branches. Its weight was also about eight kilograms which seemed light compared to its volume. But because of how hollow it was with all the holes, Lin Mu understood the weight difference.

"Let's see what a high grade herb's effect is on the core…

" Lin Mu was a bit excited and activated the Omnicore Ascendancy.

~Huala~

This time the effect was a lot more drastic, with the Faux Green Brain coral glowing brightly. It then broke apart into fine particles, transforming into pure wood elemental energy.

"This is… So much greater…

" Lin Mu was stunned at the amount that was released from it.

The light wisps were actually greater in amount than the original volume of the Faux Green Brain coral, which just showed how much energy had been condensed into it.

~humm~

And once it was absorbed into Lin Mu's body, the effects were much stronger. Unlike the previous times, he acutely felt the vibrant wood element passing through his body and crossing his muscles and tissues.

It was a pleasant and yet pressuring feeling which soon reached his liver. There the wood elemental energy wrapped around the wood core that was about eight sand grains in size and started to condense.

~shua~

It took longer than usual, as the amount was larger than what Lin Mu had used before. 'It's possibly seventy percent of the total wood elemental energy I've consumed so far.' Lin Mu estimated.

'Time to start.' Lin Mu thought and drew out all the herbs in an ascending quality.

~SHA~SHA~SHA~ With his experience with the wood core, Lin Mu was a lot faster with the water core. He didn't need to take it slow and observe it too much, as the process was basically the same. The difference being the location of the core. The water core formed between the two kidneys and started off minuscule too. But it only took Lin Mu a single day to consume all the water elemental spirit herbs and grow the core to the size of four sand grains in size.

Now that he had reached this point, Lin Mu could move onto Water elemental Immortal herbs.

"Let's see… the next herb that fits would be… ah, a hybrid herb.

" Lin Mu checked the shelves.

He pulled out a box from a shelf that was between the water and wood elemental sections. It was a type of grass, and there were several neatly packed bundles present in the box. The grass was blue and green in color, while fine glittering patterns shimmered on it. 'Sapphira Ocean Grass… I guess I'm finally tapping into more of the stuff Lanbao gave me.' Lin Mu had obtained this from none other than the Deep Sapphire City.

This was a special immortal herb that had dual properties of wood and water. Though it was still more focused on wood element and yet was found at the bottom of the ocean. Finding it on the continents would be simply impossible, and there was a high chance Lin Mu might be one of the few people actually having this in the Rust Sky world, other than the Haima clan now.

~SHUA~

Upon using the Omnicore Ascendancy, the Sapphira Ocean Grass dissipated into its base elements. Green and blue wisps of light floated in front of Lin Mu, which he observed for a bit.

'I guess I'll also expand on two Cores at once from this.' Lin Mu reckoned and absorbed the two types of wisps.

This was his first time growing two cores at once, thus he actually observed it in detail. The wisps entered his body and split into two paths. The wood elemental wisps went to his liver and the water ones went to his kidney.

The sensation he got from this was both cooling and pleasing, which almost made Lin Mu tremble.