When Elenei felt Mira's energy coming into contact with her body, she immediately lowered all her defenses. She even had to go so far as to reduce her natural defense as she's just too strong.
It can't be helped. Mira is just too weak right now compared to her. Unless she wanted Mira to hurt her, such a thing would never happen, even if she stood there without doing anything.
After she lowered her defenses and took in Mira's energies, she wrapped her own Qi around them, forcing them to 'merge' with one another, essentially linking her power with Mira's.
Such a thing normally wouldn't be possible, but due to their similar nature and the black runes lining Mira's Qi, ice, and Yin Flames, Elenei was able to do this.
Though calling it a link isn't exactly correct. It's more like Mira's black runes parasitized Elenei's Qi and is using it to fuel itself.
