While he was dying and had constructed his totem, Azaroth planned to use it to eventually revive in the future. This totem would preserve his drop of essence blood, Demonic Energy, and soul.
When he revived in Edwin's body, Azaroth first planned on increasing his cultivation base as much as he could. He could have reached the Demon King Level with that much Demonic Energy.
However, the presence of the Celestial Blood within Edwin's body was out of his expectation. And he used his remaining Demonic Energy to create the Triquetra Ardor by fusing Celestial, Demonic, and Humanely Ardor.
Since Azaroth had barely reached the Elite Demon Rank, he didn't dare to pull out his Essence Blood and fuse with it.
Edwin's physique was too weak to fuse with Azaroth's Blood essence. It would have exploded.
And Azaroth couldn't pull out his Blood Essence because he couldn't preserve its energy outside the totem.
