Christmas is a good time to grind b07 bot lobby XP, even though the main objective is to unlock the camos. Treyarch has activated Double XP during the holiday period. This means that you can level up faster, both in terms of player rank as well as weapon XP. It's time to max out your gun levels and prestige for the mastery camo challenges. There's also a bug in BO7 Zombie that can be used to supercharge farming.

 BO7 Guide to Christmas Zombies 

 The "freefire glitch" is present in the Christmas update. It involves using the Free Fire upgrade (which normally grants temporary limitless ammo) to completely remove overheating, and the ammo limitation for certain guns. With this glitch, automatic shotguns like the akimbo Aikita never overheat. They can also fire forever without needing to reload. In essence, you become a walking-turret. Perfect for mopping up waves after waves of zombies in order to gain XP.

 In order to do this, activate Free Fire normally with the Akitas shotguns in place. A bug has disabled their overheating system permanently until you swap them out. The triggers can be held down and the spray will continue without any cooldown. The operative discovered the glitch and said "you can pretty much continuously shoot... making it one of the best if not best weapons to use with free-fire." Other weapons which benefit are the crossbows, launchers, etc. (basically, anything that has limited shots), however, the Akitas are unique because you don’t have to pause for reloading or venting – true infinite fire. Double XP activated, this glitch will allow you to earn insane XP quickly. One report said you could reach round 100 using the infinite-crossbow method in just over an hour. But shotguns were even easier, since you can AFK to a certain degree. As long you keep your eye out for any zombies or bosses that move, you will be in good shape.

 Use this to gain camo/XP. You can use this glitch to earn XP and camo. This glitch can be your friend. This glitch allows you to quickly grind out kills (elite kills), rapid kills etc. by camping in an area that is safe and letting your Akimbo guns go. A good spot to camp was the Pack-a-Punch, which is historically a safe place. Note that in the Christmas Update zombies do not just go there anymore (they will now throw projectiles) if you can't get them. When you are in a well-known pile-up area, kill all zombies that line up as soon as possible to stop them from hitting you with meat. Or, find a corner that has zombies moving in a certain direction and keep the fire button pressed. Double Tap increases damage to an absurd level, which is described as "absolutely ludicrous dude...we don't overheat". You'll find yourself swimming in XP.

 This bo7 accounts glitch is not to be used at any cost. Intel indicates the developers are currently on holidays and will not be able to fix this glitch until after the New Year. Report noted that nobody is working and it should not be patched until after the new Year. It means you are free to use the exploit during this time period. You should still be discrete. If you care about the leaderboards and any anti-cheat measures, then consider that you are using an unintended function. But for leveling up and camo grinds, it is a blessing.

 One other exploit is the meat throwing spot. Before, zombies would stack up beneath you on a particular table or ledge. It only works half as well now. Zombie may not be able to climb up but they can still throw stuff. It is not as safe. You can find an open space (such as spawn or outdoor zones), train zombies, and then destroy them with endless ammo. You'll need to complete weapon camo challenges. The challenges will be completed very quickly. It's possible to get through the game very quickly. This glitch and double XP can help you get through the earlier levels of camo (Golden Dragon Bloodstone Doomsteel), which is the fastest way to reach the Infestation Camo.