Its definitely worth adding a card to your inkwell for the first five turns, but you dont have to keep doing that forever
Return of the Wildspeaker gets around both because if an opponent destroys your biggest power creature in response, you will just draw whatever card has the most power in play after that
The other option for leading the deck is Arthur, Marigold KnightArthur, Marigold Knight, which offers an interesting way to cheat out more members of your team when you move to combat
This is a number previously outlined but not confirmed by people from the Lorcana team
I've even read the card to people and still countered a game winning spell later because they forgot that it could do that
Even if we ignore the infinite mana win condition, Oona, Queen of the Fae is still very much worth playing