You choose which player, planeswalker, or battle the Human is attacking
If a player does, that player may choose a noncreature spell from their graveyard and add it to their hand
So here with Blue, Black (typically the colour of stealing life or outright destroying it) and Red, you will see creatures such as Cybermen, Daleks and many more besides
Against its own decks, Coven Counters was able to hold its own well and even snatch victory from time to time with the help of the boardwipes
Even though most of these are (surprisingly) not assassins themselves, they synergise so well with the cards from the last section that Id consider them essential support cards
We havent seen serious changes or new mechanics since Locations were introduced in set 3 Into the Inklands