It was different from spirit energy found in heaven and earth it was energy filled with life energy which was continuously strengthening his body.
Rudra quickly located the source of the this life energy which was the bead in his heart , he tried to investigate it but found no result he could only give up. But luckily found out that the bead was releasing the two types of energy one was life energy and the common spirit energy but much higher quality then the quality of sprit energy present in the surrounding. Which made him extremely happy because even if he is doing nothing his strength was still constantly rising because of the energy released by the bead.
Now that he could cultivate Rudra was in dilemma, Now he has two choices for his future path, first and most ideal choise was to leave the forest and look for an good sect to join for better guidance, resources and techniques but now he has the bead in his heart which was constantly releasing the spirit energy which made Rudra think he did not need resources as for techniques he decided to not think about them for the time being. And for second choise was to stay in jungle and increase his strength unit he can protect himself. He knew if he entered the sect and someone with much higher cultivation noticed the abnormality in him or could sense the bead in his heart the things could get ugly for him so after long thinking he chose to stay in the forest for the time being.
After deciding the path for himself Rudra immediately started to cultivate the chant.
Now that his only whish of being able to cultivate has come true he decided not to waste a single second in life and to only focus in increasing his strength.
Rudra approach toward martial arts was .''The path of the martial artist is like a flame. Practicing the martial arts will only cause pain. The dangers are countless and the road is filled with obstacles. Everyone who walks down it will eventually turn to ash, but the true martial artist will be reborn from these ashes. Even if I was only a small and weak moth, I will walk into the flames without hesitation. I will fight my destiny for a one in a million chance that I will experience my own samsara and be reborn into a flaming phoenix''
He quickly entered the trance like state and started cultivating. He cultivated for full two days without waking up from the trance like state . He experienced full 4 breakthrough during cultivation and now was at 6 rank of body refining his flesh and viscera was fully refined and he was halfway through refining muscle.
When he opened up his eyes he was surprised by how long he was is the trance like state and his continuous breakthrough but before he could celebrate his nose was assaulted by a filthy smell in cave and the source of the smell was the impurities released by his body in the process of refining he quickly ran toward the stream to take bath.