There are only five official cards with Eminence, though a sixth card, the predecessor to the mechanic, sneaks onto the list
The concept is cool, and after Equipment, its the best addition to the game by far since legendary permanents
Provided the system generally works and is heading in the right direction, we'll begin making revisions soon after MagicCon for any structural changes we want to include
If you consider that Vindicate targets creatures and planeswalkers at least 80% of the time you are onto a winner with a card that costs a third less while only lose a fifth of its functionality
A 4/4 for four mana, Raggadragga not only provides creatures with mana abilities with +2/+2, but it states that whenever such a creature attacks, it untaps, meaning they may be used to attack and produce mana within the very same turn