Klaus has not only survived the horrors of the past, but you can add him as an ally in the Ashes of the Damned map in Black Ops 7 Zombies.
However, you can't just waltz in and send him a friend request. Instead, you'll first have to find out his location and then figure out how to add him to your party. Thankfully, this quick guide will outline all the necessary steps to complete.
