If one of them resolves, it will remain in effect until the game ends, Figure of Fable leaves the battlefield, or some subsequent effect changes its characteristics, whichever comes first
On turn five, it's so strong that even if a few sit around in your hand early you're in good shape precisely because you can cast it on turn five
Then you can +1 her to make a 2/2 Black Zombie token to block attacks on her or swing for wins or die to draw those cards
It's worth bearing in mind that none of these decks are likely to hold up against a custom-constructed deck - there are way more powerful deck lists floating around the Disney Lorcana meta right now
The first two chapters of this saga are good enough at 3 mana, creating a creature with the possibility of ramping you and letting you pitch two cards for some draw
Play some tonight and then this weekend