Blacks Ops 2 introduces the Wildcards system, something designed to allow players to mix things up and modify existing class structures. You can have up to three Wildcards active at once but keep in mind that they take up one of your class slots each so it’s up to you to decide whether the tradeoff is worth it.
The Wildcards are listed as following:
Allows you to select a third attachment for your primary weapon.
Similar to Primary Gunfighter, this allows you to choose a second attachment for your secondary weapon.
Same as the Overkill perk from previous games, this Wildcard will enable you to equip two primary weapons at once.
Lets you equip two pieces of lethal equipment at once.
Perk 1 Greed
Allows you to select a second Perk 1
Perk 2 Greed
Allows you to select a second Perk 2
Perk 3 Greed
Allows you to select a second Perk 3
Similar to Danger Close, this allows you pick two pieces of tactical equipment, but you’ll have to give up your lethal equipment.