Holden from MWEB GameZone breaks down the perk system from BLOPS 2.
Black Ops 2 has changed the way in which we use perks due to the newly introduced addition to the create class system. Traditionally perks have been separated into three groups, with the player having to choose one perk from each group to finish the process in creating a class. In Black Ops 2, however, we have seen two specific changes. The first being that the player doesn't have to choose a perk from any of the slots, a player can rather decide to take absolutely no perks at all! The second big change is the addition of wildcards. Wildcards allow players to have the option to choose two perks from the same group, which allows players to combine perks that would previously not be able to be combined.