As a teaser they obviously spoiled two relatively high powered cards and these cards don't seem to break anything. Although the power will be relatively high, I doubt it will lead to extreme power creep.Quote from Drowsy Emperor »I don't know what to think. I'm considering selling out of the format out of the concern that they will spike the power level and indirectly render our existing decks obsolete. Also, the potential hit on value is a concern.
The reason why I play this format is because it changes only very slowly. If it becomes a second Standard then I just don't want to compete (money wise) in the long run.
Nothing rotates out, so it is not really comparable to Standard. However, if there is a chase mythic in the set you need 4x for your deck, then it can become expensive.