Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When this creature enters, for each opponent, put up to one target nonland permanent that player controls into its owners library third from the top
If youre making a bunch of colorless artifact creature tokens, the Guide can give them a slight power boost
No, it has no worthwhile uses
The only reason this isn't directly better than the Vault or the good cards like it is that you can't reliably play this early and typically need a lot of looting and discard effects to even play at all
Also, Dimension Valley is less important in psychic builds that play both Xatu and Malamar
The same cards once traded for snacks or marbles have now become high-value assets, frequently auctioned for tens of thousands, sometimes even millions, of pesos