- Assire used to be limited to tutor bronze and silver in beta, but can now put a legendary gold back in the deck for reuse or remove it from the opponent's graveyard, thereby preventing consume, Renew or reuse in any way. Too strong imo.
- Angouleme is indeed very risky and I have never seen her in any deck. So why not "balance" this and make her more interesting? Give her a bit higher strength, a bit lower provision and a provision limit for the artifacts she can spawn. Isn't it better for the game (more options and variation) if all cards are at least a bit interesting to include in a deck?
- Fringilla is similar to Angouleme. Never seen her in a deck.
- Hanmarvyn's Blue Dream (10p) is mostly used in R3 and can find a good target most of the time. Unlike Royal Decree (12p), it not only finds a good card, but it can also mess with the opponent's strategy regarding cards in the graveyard (consume, Renew, or anything else), in that case making it even stronger than Royal Decree. Ozzrel is 9p for consuming a unit, HBD is 10p for replaying a unit. That says enough about the "balance" of HBD.
When cards can tutor from bronze to legendary gold, there is a balancing problem, because the total value of the card can be anywhere on a very large range and a proper provision cost cannot be determined. These cards can be not interesting as they are too inconsistent and/or too expensive (Angouleme and Fringilla), or they can be very interesting because they are consistent and not too expensive (Assire and HBD).
Provision caps are also used for decks and leaders. A tutoring provision cap together with strength and provision adjustments does not kill cards, but it balances them.