As you may want to know the Oversoul Team made a mistake releasing the wrong skills for the purchasable versions of the the Witchblade and Fiend characters this weekend. But they will be able to keep a unique skill, Corruption, which is still the most powerful Damage Over Time in the game right now. The cost of casting Corruption will be increased to 10 points. In addition to Corruption, these characters will be given a normal neutral offense-based deck.
The Oversoul Team are currently working on the ability to sell back souls that you don't wish to keep. When they implement soul sellbacks, it will be slighty different. Anyone who bought the characters this weekend will have the ability to sell them back for the full Soul Gem value at any time. So, if you are unhappy with the rebalanced character, you will soon be able to part with them without losing out on any Soul Gemss. This is only going to apply to the Witchblade and Fiend character purchased over the weekend time period. And anyone who buys them after the rebalance will be able to sell them back according to the normal sell back policy (90% within the first 24hours, 10% after).
