I 'm actually surprised noone has writen a review about this card yet, so I thought I'd write one myself. I think this card is actually quite good. Mystics don't usually have a good source of card draw and this card is really good for that. But it doesn't offer only card draw, it can also offer resources, which are usually not a big issue for Mystics; you can run Forbidden Knowledge and/or David Renfield and have a satisfying source of resource generation, but the best part of this card is that it can give you a certain amount of resources and/or cards, what you need at most at the time you use it. The only other card that uses the language "gain X amount of this, or X amount of that or any combination thereof" is Emergency Cache (3) and both of these cards offer you the choice to get what you need at most at the time you use them, and I think that's kind of neat. Now this card can't exactly be used whenever you want; you have to wait the right time to use it, but when you use it, you get a really good bonus.
I think a lot of Mystics will usually have plenty of good targets for this card. A spell that has run out of charges or that you don't need in play anymore, a used-up Forbidden Knowledge, an Arcane Initiate that you don't want in play anymore either because you 've drawn many of your spells, or because you want to get rid of that doom (or maybe both), but I think the best target by far for this card is David Renfield. It basically becomes another card that allows you to abuse him. Why use Forbidden Knowledge or Painkillers to kill him after he has accumulated a lot of doom?? Use this card instead and get even more benefit out of him!! Now Moonlight Ritual and Calling in Favors are still superior choices for abusing David Renfield but this card adds up to these options and it can be a better inclusion in some decks.
I think this card is especially good for Marie Lambeau because she usually wants to have a lot of spells in her deck so that she makes good use out of her special ability and she 's the no. 1 candidate to use David Renfield. It might be bad for Akachi Onyele because she might want to keep her spells in play so that she can recycle them with Spirit-Speaker and it doesn't really comply with decks that use Recharge. But I think it can find a good place in many Mystic decks.