The Play Boosters received in this box are the same type that can be purchased separately, and the contents are, for the most part, randomised
The signpost uncommon in that set was Foggy Swamp Spirit Keeper, a typical draw-2 payoff that spits out 1/1 spirits which can only engage in combat with other spirits
It's a truly monstrous card, as mythic rare Dragons tend to be
Ultimately, for these reasons, we decided to instead play Bladecoil Serpent as our go big card for the midrange mirrors
Most would prefer their dorks and mana rocks to ETB untapped, so you'll get a free dork instead
This one is absolutely under consideration as the first one built