After Vaan stored the bottle of blood essence inside his Heaven-Swallowing Space, he entered the lava pool and continued with his body tempering.
The Fire Dragon God's blood essences contained unbelievable power and benefits, but the means to acquire them were limited.
Considering the Fire Dragon God Bloodline would also interfere with his Immortal Lycan Bloodline, it was better to save the Fire Dragon God's blood essence for when he hit a bottleneck.
That said, the bottle of blood essence did not go to Vaan unnoticed.
The second stage had over three dozen Rank 4 True Dragons, and they were particularly sensitive to the Fire Dragon God's bloodline.
As such, they noticed Vaan's bottle contained more than just a single drop of the Fire Dragon God's blood essence.
Although they didn't know how Vaan acquired more blood essence, they all revealed covetous gazes.
