Now, it was at that moment that Lucas showed up "coincidentally," then saved her and the tree. But she was already gravely wounded at that time, so she couldn't hold on any longer. It was at that moment she sensed the purity in the hero's heart. She was fascinated as she couldn't believe a human could be so pure. So she resolved that since she was already at her end, it would be better for him to have it—perhaps that's how it was destined to be.
Anyway, that long, cringy-ass story aside, spreading out my mana into the environment and literally using myself as a life radar was how I found this stupid tree. It really wasn't even that hard—the moment I tried sensing it, it was just there.