1 Wildcard of any rarity Can be one of the cards mentioned in the above common, uncommon, and rare or mythic rare slots, including Booster Fun cards
The only reason he's lower on the list, is that his 3 Willpower will easily have him removed as soon as he's exerted unless you have some other means to protect him
Additionally, the update will include a new trading feature, allowing players to complete their collections with the new cards
You can let your enemy keep a Fellwar Stone, and you keep that Staff of Nin
As a bonus, Greymond will give your Humans stat boosts so long as you control four or more (and it counts itself as one of them, so only three extra Humans are needed)
Done right, it can significantly increase a cards value and make it easier to sell