This card gets new life with the addition of Occult Reliquary to the game, becoming essentially a cheaper Preposterous Sketches that doesn't need a clue for those early turns when you're fishing for your spells to put down. Granted it does start to fall off when you're already in a good position but the card makes for good mitigation as a floor even before you consider the decks where you're playing Astral Mirror and want to be playing the many cards that can increase your slots.

A basic analysis would say you need to draw at least 3, probably 4 to make this even worth considering. You spend an action to play this card, this card itself is lost, and you pay 1 resource (worth approx. 0.5 to 1 action). If you only draw 2 or less, you probably wouldve been better off just using the draw card action.

You can't choose to discard weaknesses so its not useful on that front either. Low arcane slot mystics is currently a rare archetype but obviously pairs with Binder's Jar and Explosive Ward.

Might find a home in Amina Zidane since she doesn't have the willpower for the typical spells, or a Dragon Pole Lily Chen deck? I think at the moment it might be a bit too hard to setup for too little payoff.