Devoted to the Dragon by Sirena Song

She’s the last omega dragon shifter. If her designation ever awakens.

For centuries, Randi has waited for all her mates to arrive and awaken her omega designation. She spends her days in lonely flight and her nights managing her rut bar, Frenzy.
Now, the wolf shifters are on the verge of extinction. The mate runes have vanished, and alphas are turning feral. With Frenzy’s services in high demand, the Wolf King sets his sights on the dragon, wanting her magic for his own.
As Randi prepares to face off against the King, two of her guards try to prove that even without runes, she’s meant to be theirs. But the visit with the King brings back old enemies and starts the clock on an ancient dragon ritual.

Will Randi and her mate-contenders be able to finish the ritual before time runs out? Can they convince her they will do anything to make her theirs?