Weve seen the occasional Commander/Universes Beyond card get tried out in Magics Legacy format recently, stuff like Forth Eorlingas
Now most of the worst spells were proactive like creatures
Efficiency can be determined simply by the reward you receive at certain mana costs (Counterspell and Cancel do the same thing, but Counterspell costs less), the total payoff you receive from a single card (Hull Breach and Decimate are both good cards, but Decimate usually covers much more ground), or the payoff you receive in conjunction with other cards (Anointed Procession makes other token production cards completely absurd if unchecked, which is usually better than adding one more card that simply makes tokens like Spectral Procession in a token strategy)
To open the file, Run the CCG maker and click on the file menu and then select Import , then select the MTG.dat file from your hard drive
Oh sh DOCTOR WHO: BLACK Black has fewer cards than other colors in this expansion, especially if a Dalek deck doesnt interest you