As Beastmen grow in power and infamy, they attract the attention of the Chaos powers. This is both a blessing and a curse, for many mutations pleasing to the gods are anathema to those they are thrust upon.
To represent these strange attributes, some models may be given Chaos Mutations. A Mutation does not affect a model's mount (should it have one). Each Mutation may only be chosen once per army.
This grotesque gift of the Chaos gods causes the recipient's skin to constantly ooze with a vile, foul smelling slime.
Any enemy model that directs its attacks against this model or any unit it has joined during the Combat phase suffers a -1 modifier to its rolls To Hit.
A Beastman that sprouts an excessively sharp, large or twisted set of horns is supremely confident in their position at the pinnacle of the Warherd, so obvious are the Dark Gods' blessings.
Characters only. This character and any unit they have joined gains the Stubborn special rule.
The Beastman has been blessed by the Gods of Chaos, and its torso bulges with huge muscles.
This model (but not its mount) has a +1 modifier to its Strength characteristic.
The Beastman's pelt exudes clouds of smokey darkness, hiding them from the eyes of the enemy.
Characters only. Any enemy model that targets this character or any unit they have joined during the Shooting phase suffers an additional -1 To Hit modifier.
This Beastman's lower incisors have grown into sharp or excessively large tusks with which they gouge savage wounds into the flesh of their enemies.
During the Combat phase, the Armour Piercing characteristic of any weapon used by this model (but not its mount) is improved by 1.
The Beastman's horns have twisted into the semblance of a potent daemonic rune. This promise of ascendency to the ranks of Daemonhood fills its followers with courage.
Beastman Chieftains only. Unless this character is fleeing, friendly Bestigor, Gor and Ungor Herds gain a +1 modifier to their Leadership characteristic whilst within this character's Command range (to a maximum of 10).
Some Beastman grow additional arms, allowing them to unleash even more carnage upon the battlefield.
This model (but not its mount) has a +1 modifier to its Attacks characteristic. However, this bonus attack must be made using an ordinary hand weapon.
The Beastman's skin has encysted, forming a dense layer of crusty natural armour as tough as chainmail.
Models whose troop type is 'infantry' only. This model gains the Armoured Hide (1) special rule.
The Dark Gods gift some Beastman with acute senses, additional eyes or even extra heads, granting them unnaturally fast reactions.
This model (but not its mount) has a +1 modifier to its Initiative characteristic.