Relligo Spiritus (гет)

“What did you think the Relligo Spiritus charm did, you fool!?” he spat.
“Um...” Hermione wracked her brain, though with him still shaking her the thought didn’t come easily. 
She gasped when she unearthed within her psyche the spell he spoke of, her eyes flying to his furious face. 
“Oh.... my....” Hermione breathed when he flung her back against the wall once more, realising she knew why he’d come; knew how he’d survived when even her healing efforts ought not to have saved him from his well-earned oblivion. 
“Tethered Souls,” he snarled in her face, looming over her threateningly. “You tethered our fucking souls, Granger!”