A Weapon of Magical Destruction

Magic is not a game. It's real, deadly, and inescapable.
Sage Cynwrig knows her way around a pair of twenty-sided dice, and has forgotten more spells than you'll ever know. But when her mother is killed by a weapon of magical destruction, fantasy merges into a strange new reality. Her birthmark morphs into the Tree of Life, her boss goes full troll (warts and all), vampires start hitting on her, and shadows do more than just follow silently.
Had Sage been warned about her special lineage, before her mother's murder, she might have agreed to join the Anonymous Supernatural Security and Elimination Taskforce (A.S.S.E.T). When agent Grey Maddox shows up to recruit Sage, filling her head with stories of an ancient race of people uniquely gifted to withstand the forces of magic, she dismisses him as a fraud.
The truth about Sage's lineage comes crashing down around her when a supernatural pick-up artist tries to kill her. Bearing the mark of the Tree of Life makes Sage special while also putting a target on her head.
With the weapon still at large, and strange Fae creatures popping up all around her, figuring out who to trust is priority number one. Only then can Sage find the key to neutralizing the weapon before its power is unleashed again.