Primarily, it amplifies the collector's journey, creating fresh "chase" cards that can reinvigorate interest and provide new goals
This means Sudden Chill becomes discard 2 cards, Mother Knows Best can bounce 2 characters, Let the Storm Rage On becomes deal 4 and draw 2, and Friends On The Other Side becomes draw 4 cards
By the time Mufasa is out, those cards are probably much more relevant
As you can probably tell from this article, I'm still working my way through various games in the series and am eager to cover even more lore in the future via Lore Tidbits
When it doesn't work, i.e
As a trade-off, she requires another of the player's characters to be returned to their hand to avoid immediate self-banishment, but it's a price that's well-worth playing