Really, Cursed Scroll is not that bad.
Remember the first reviews?
People thought it sucked. Why?
Ice Age's block was a slow environment with high CCs and multicolored spells. Just like Invasion. Scroll was overpowered because Rath was frikkin' fast as hell. Especially red.
Guess what? Scroll will not be overpowered because it will be hard to dump your hand. Add cantrips for even more fun. People will hope that Abandon Hope is reprinted so they can dump excess cards in a hurry.
Even red is slow to the point that Scroll won't be overpowered. And with the multicolor nature, allmost everyone will either have white for Disenchant or red for shatter, and the like.
...that, and I want two more scrolls for a set'o'four.