Step 1: Fill up the skulls



Skull 1: Needs Fury kills and is located inside Spawn Room

Skull 2: Needs Zombie kills and is located in the intersection right beside the mystery box location inside the cave

Skull 3: Needs Zombie kills and is located right outside the cave on the way to the castle

Skull 4: Needs Fury kills and is located at the excavation site near the broken drill and buildable table

Skull 5: Needs Zombie kills and is located in between Stamin-Up and the Pack a Punch portal



Step 2: Do the challenges

There are three challenges you must do, with them being randomized in the three spots around the map. The challenges are as follows:

1. 5 melee kills, 15 headshots, 10 explosive kills

2. Defend the pillars around the map by activating them and then staying beside it inside a circle for 30 seconds for each pillar (they make it pretty obvious to see which pillars)

3. Find the Totems. Three purple glowy totems will spawn around the map. I don't know the exact locations myself, but they are very obvious to see, even from far away, so just look around a bit, and you'll find them



Step 3: Upgrade the swords

Unlike the staves or bows from real maps in zombies, the upgrade processes for these Elemental Swords are very easy

Wind Sword: There are four bright lights around the map (you legit cannot miss them) that you need to collect and then the sword is unlocked. Keep in mind, if you are training a bunch of zombies, don't grab the light because it will slow you down for around 15 seconds, allowing zombies to overwhelm you

Lightning Sword: In the power area, literally across from the power switch, there is a lightning bolt on the floor you have to interact with and a purple orb will spawn. This is most annoying on solo, but you have to stay within a specific radius and guide the orb back to the castle. If you walk outside of that radius, you have to go back to the bolt and try again

Ghost Sword: Once the sword has been placed in the Ghost Pedestal, a orb will spawn. Interacting with it will put it on your person. You will then be timed to go through the map and interact with these four altars around the map. The route I recommend is going from the castle where the orb spawns you first go to right outside the path leading to the Throne Room, there will be an altar by Deadshot Daiquiri. Then go to the spawn area to get another altar, then go to the Pack a Punch portal and across from it will be another altar, then go back to the castle and go into a separate section to get the last altar.

Fire Sword: You need to kill burning zombies around these empty stone cauldrons that are around the map. I don't know the exact amount of kills, but it doesn't take too many. One cauldron is right outside of spawn leading down to the intersection, another cauldron is inside the intersection by the mystery box location, and the last cauldron is inside the Throne Room. Speaking of the Throne Room, this is the area I recommend training zombies until the fire traps light them all on fire, then lead them to said cauldrons then kill them until the cauldrons are lit up



Step 4: Start the Ritual

Keep killing zombies at this point, because they will drop three separate ritual tokens at random. Take these tokens to the MPD-like area with the pyramid and the gateway, and put the tokens on a table in front of the pyramid by interacting with it. Once you do this, go back to castle and find this button thats glowing on the wall next to the Elemental Swords room. Pressing this button will spawn a spirit on the map somewhere. The said spirit looks like a small ball of light, lying dormant waiting to be interacted with. Once you locate this spirit and interact with it, you will be forced to stay in a circle and fill up the spirit with zombie kills until the orb disappears. This step is pretty annoying, and so I will give you all the locations that I know of, there may or may not be more so bear with me on this

-In spawn by the campfire

-Between power room and staircase

-Across from the pyramid

-In the Throne Room by Mule Kick

-Right outside the Throne Room by Deadshot Daiquiri

-Right outside the power room leading to the intersection

As I said, there may be a location that I don't know of but thats the locations I know of. Once you find a spirit and fill it up with zombies, go back to that button and press it again to spawn the next spirit. You need to do three. If there are multiple people on the map, just have someone stand at the button and press it immediately after another player finishes a spirit. Once this is done, your basically finished with the Easter Egg

Step 5: Dragon Boss Fight

The gateway in the MPD-like room is now open. Annoyingly though, you need 25k points if on solo to go in the portal leading to the boss fight. 50k points for co-op, and presumably 75k-100k points for 3-4 players. When you enter the boss fight, the dragon will spawn in the middle of the arena and a health bar will be visible to the player. I suggest the Pack a Punched Spitfire or the Pack a Punched Titan, as one is so fast that the damage melts the dragon's health, and the Titan is slow but very damaging to the boss. During the boss fight, zombies and soldiers will spawn on the player(s) constantly. As for the dragon boss himself, its honestly underwhelming. Just getting consistent fire on it is enough to kill it before it does any real damage to you, however it does have elemental attacks that can hurt you if you not careful. Once you beat the dragon, it will die, and you'll be teleported back to the main map. There is unfortunately no buyable ending and the map does not end after the dragon's death, so feel free to quit or try and get a high round! Congratulations, you have beaten Serpent's Call!