However, one of them just made an appearance
I suggest reading this one for yourself since its not very long and its whole gimmick is that it's like an in-world official document
Fun fact: Arcee deals the damage to a creature when you do her mana ability, meaning that when she is equipped with the Collar, she has deathtouch, and the creature she deals damage to will die
For more on this kind of strategy, read my article on the BAE (The Boros Advantage Engine)
I also wanted to quickly talk about 2014 Sets : Born of the Gods , Journey into Nyx , Conspiracy , Magic 2015 , and Khans of Tarkir My Pick : Chief of the Edge ( Khans of Tarkir ) The Innistrad block had draft archetypes built around specific creature types, but the typal theme was a larger component of the block