Foils of this seem like a relatively safe bet. I bet they start out at like $0.25 and I bet it takes a while for Bruna, Light of Alabaster players to come around. While it's true drawing a ton of cards when you're trying to "combo off" with Bruna isn't exactly what you want, if you have enough if your yard to win, this can draw you enough cards to ensure you get some countermagic to ensure your victory and it can also buff Bruna quite a bit. In a deck like Uril the Miststalker you are even happier to draw a ton of cards. Rafiq can probably use this, although 4 mana is pricy. There are a lot of Voltron commanders that benefit from a silly, savage card like this. It even boosts for copies of Arrest or Pacifism you may have in play. I think this is very good. I don't know if I am paying cash for foils yet, but this is virtually assured to correct upward to an extent that non-foil copies may be impacted, but I tend to doubt it. We're not looking at scarcity like we see with out-of-print sets. Cards printed after EDH was adopted have a much tougher time of being the next Ghostly Prison in terms of pricing for uncommons. 1-of formats have a tough time doing that.