Remaking Feroz's Ban

[Lurker101]

Feroz's Ban is a card that has always frustrated me because it's an interesting sphere effect that would be perfectly at home in shops if it weren't so overcosted. It's also hard to fix this by just reducing the CMC because it quickly becomes OP so I was thinking about what it would take to make this vintage playable without being overly oppressive. This is what I came up with:
Mishra's Ban 
Legendary Artifact
Creature spells cost  more to cast.

I think making it legendary balances it by not allowing multiples to stack and it also makes a lot of sense with the flavor of the original card. I think reducing the cost to by two makes it playable without being undercosted. So would this be playable and balanced?

[Wagner]

Seems no one has much to say here. It looks fine to me frankly. Do you think shops would maindeck this?

[Lurker101]

I was thinking maybe as a 1-of but probably not more than that MD. It's not something you really want to draw more than 1 of against most decks but it's really effective when it lands against any deck hoping to cast creatures and it doesn't force you to pay every upkeep or waste a land a drop like Tabernacle does.

[xouman]

Imagine a thorn x 2, costing 4 and adding 2 to non-creature spells. It would have an instant impact on vintage, probably negative to the health of the format. Creatures are not so impotant, but I believe that a feroz's ban for 4 would be really played in sideboards.

What about a

miniferoz's ban      2
Creature spells cost 1 more to cast.


It probably would see play in prison decks, not sure if MD or in SB. That card would have a tremendous impact in non-vintage formats (bigger than thorn, which should be better in vintage)

[Lurker101]

Yeah a double thorn for 4 would be too good/annoying. I could see the mini-ban getting played as well while not being overly oppressive in vintage. It's another example of a card that might see 1 or 2 MD/SB slots.