Manga Like Ophelia the Oracle Queen

There's nothing more frustrating than a novel with endless tragedy and zero triumph. Such is the tale of Ophelia, a powerless princess who is used by those around her only to be cast aside and poisoned to death. So when an ordinary bookworm wakes up in the princess's body, she knows that she must rise to the throne in order to survive. Being the illegitimate daughter of the king is a setback, but luckily, she also happens to be the daughter of the palace temple's abbess. Once she pretends that she had a vision of her future self as the queen, the king starts relying on her "oracles" to guide his decisions. But even with her father's support, Ophelia knows that eliminating her political rivals won't be an easy task. Will the new heroine be able to scam her way to queendom, and more importantly, a happier ending? (Source: Tappytoon)