This sounds like a wait for another set of cards problem
Again, just like Dark Confidant and Bitterblossom, you must keep an eye on your life total, but with the amount of card advantage youre gaining over your opponents, its only a matter of time before you out-advantage them and simply win the game on sheer card volume alone.
Yes, there are builds where you can stock your graveyard up, but Im thinking you could reanimate this blue creature with something like Unearth or Helping Hand, or play it in a tempo build and cheat it in without casting with something like Collected Company
An easy upgrade for people playing Tuvasa the Sunlit, Hanna, Ships Navigator or even the more recent Alela, Artful Provocateur
Of course, a fine play for seven mana tends to be back-breaking for four or five and luckily, thats how much I expect to regularly be playing this for
Finally, Olivia has haste, which allows her to attack immediately after being played without waiting a turn