Rex observed through his Awakened's eyes and saw that the Life Essence was handled and turned into cursed energy at a rapid pace by his own cursed source. He could see the task being done automatically and ended in mere seconds.
Its product was an immense amount of cursed energy.
Even though Rex had already up his expectations, this was still going beyond.
He reckoned that the cursed energy acquired from the Life Essence absorbed from the mutated tiger equated to the results of him relentlessly hunting cursed creatures in the Humming Damned Forest for two or possibly three days straight.
Naturally, as Calidora said, knowing his own curse is the best way to become stronger.
At this pace, the Jar of Malice is incomparable to this.
Seeing that he managed to absorb his first Life Essence, Calidora landed beside him.
"How was it?" She asked with a confident smile.