Shadowbound: An Enemies to Lovers Dark Romantasy (The Shadow Fae, Book Three)

Alaric, Paladin of Solaris
I was sent to kill her... but I submitted to her instead.
The GodKing ordered me to slay the sorceress Sylvanna and retrieve the Heart of the Eclipse-a legendary artifact said to shape fate itself.
Failure was not an option.
But when I found her, her Shadow Magic overwhelmed my Celestial Light. I alone bear the Holy Fire, yet I was powerless against her.
She offered me a deal: take her Oath of Submission and serve her for a time, and she would grant me a chance at the ...