This addon adds a ton of new undead such as the Cenarax Royal Guard and Cenarax Melee Footsoldiers. They are all trying to stop you from getting even more powerful. You can find these mobs in raids and the many structures the addon adds.

The addon also contains two new ore, Mythril and Silver which are found underground. Mythril spawns below level 16 and Silver spawns almost anywhere from bedrock to the top of the world. Silver can spawn in large ore veins like iron and copper ones in vanilla.

Created By Supernova3695  

Structures

To go with the many mobs and blocks in the addon are structures of varying sizes and styles.

Woodland Manor

A massive manor in the depths of the roofed forest, the woodland manor is a spooky home of the illagers. It holds many types of illagers from all the vanilla ones to a new one waiting to strike. Explore tons of rooms, large and small with new loot tables to roll and stuff to find.

Cenarax Stronghold

The Cenarax Stronghold is a large underground structure with numerous tunnels branching off in different directions. Inside you can find junction rooms which will contain loot in the middle of varying quality and rarity. A large center boss room will be generated in the structure as its starting point and will contain a random boss. At the moment the only boss found is the Grand Summoner boss who summons mobs and other things to reinforce the Luminous Knight and other mobs that spawn in the room.

Cenarax Outpost

The Cenarax Outpost is a large compound of structures that holds valuble loot. The tower has 5 royal guards and a commander to guard it as well as numerous footsoldiers of all 3 types. Structures such as tents and piles of stuff surround the structure. Rarely a forge can spawn in the red tents and the blue tents hold better stuff but spawn extra guards. It is the first structure to use no command blocks in its generation but instead jigsaw blocks.

Highlands Outpost

The Highlands Outpost is a varient of the Cenarax Outpost (despite actually being made before it) which holds similar features to the normal one. This one is made heavily out pale oak wood and silver blocks. It has surrounding structures like the normal version but they are more likely to repeat due to their being less of them (7 to about 22). A lot of the structures surrounding the tower mimic the structures of the normal version such as iron golem cages and tents. Like the normal outpost, it spawns with a number of guards around it.     

Catacombs

The Catacombs in a large underground labyrinth filled with spawners from the vanilla dungeon. It also uses the vanilla dungeon loot table but has a ton of chests. It spawns in all biomes except the snowy biomes.

Frozen Fortress

The Frozen Fortress is a iced over snowy undergound system of tunnels. It's tunnels are covered in snow and ice and it's spawners only spawn Strays. The loot tables contain candles and ice blocks among other things.

Highlands Tower

The Highlands Tower is a massive structure found in meadows biomes. They are the main bases of the highlands holdout of the broken Empire of Cenarax and are home to some of the strongest soldiers in the faction and their boss, the Knight of the Highlands.

Forbidden Fortress

Home of the coven witches, a large ruined fortress that houses some secrets. Do not worry however, these witches are friendly and will trade with you for some potions and other valuble items in the addon's magic system.

Abysmal Citadel

The final end fortress of the Empire of Cenarax. This medium sized fortress is found around the end and houses some of the best loot in the game. This structure houses the King of the Undead and all the remaining forces of the Empire of Cenarax. Travel to this citadel to defeat their last forces and free the world from the rule of the undead empire.

Minibosses

Along with the new mobs are new minibosses such as Luminous Knights and Cenarax Commanders.

Luminous Knight

• Heavily armored zombies from a place beyond. This tall tanky mob hits like a train and will easily destroy players with in range. However they are easy to take out from range.
• 100 hearts
• 300 XP dropped on death
• Will spawn as a raid boss on wave 7 for hard difficulty

Cenarax Commander

• Every army needs commanders. This buffed up royal guard rides a horse (with broken animations) and is very noticable over a crowd of mobs. Use their elevation to your advantage and shoot them from a distance.
• 3 varients
• Ground, no horse
• Mounted, with horse
• Raid, with horse
• 50 hearts (100 in raids)
• Use blue mythril commander helmets
• Are larger than other, normal guards
• 1 will spawn on wave 6 and 6 will spawn on Wave 7

Bosses

Grand Summoner

• A servant of the King of the Undead, the grand summoner is found within the Cenarax Stronghold central room. It will summon all sorts of mobs to reinforce the garrison of the structure.
• Does not attack him self and will activly flee from players within range. If he cannot flee he will use evoker fangs or lightning to damage enemies nearby.

Knight of the Highlands

• A large buffed up Luminous Knight who became their leader after slaying a dragon.
• Serves as the main leader of the highlands and its remnant.
• Spawns on top of the Highlands Tower

King of the Undead

• The king of the Empire of Cenarax! This massive skeleton wears mythril armor and has a ton of health.
• He wields a Void Sword but uses it seldomly. 
• He can summon tons of Cenarax Guards in around himself and the player in order to preserve the empire and it's remnants.
• He drops the Void Sword on death

Experiments

• You should enable all of them just incase you want to use future versions of the addon on the same world or if you want to use the compatible addons