The Glottkin (End Times - Glottkin)

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At start of every Magic Phase, every enemy model in base contact suffers a single S1 hit, no armour saves.

Models with this special rule are collectively known as
Chaos Champions. They can never refuse a challenge and,
if possible, must always issue one. If there are several Chaos
Champions involved in a combat, the controlling player
chooses which will issue/accept the challenge.
In addition, if a Chaos Champion kills an opponent in a
challenge, or if he kills a monster, immediately make a 2D6
roll on the table opposite. Once the result of the roll has
been determined, make a note on your army roster — that
model now has that reward for the rest of the battle. A Chaos
Champion can have several rewards, and it can even have the
same reward multiple times. These rewards cannot increase a
characteristic above 10 or an armour save beyond 1 + . If, for
any reason, a reward cannot be applied, the result is instead
treated as a ‘The Eye Opens’ result.
Note that the Chaos Champion must cause the last unsaved
Wound on a model to claim the kill (if a model suffered
multiple Wounds simultaneously, randomise between
the sources to determine which caused the final Wound).
Causing an Unstable enemy to perish as a result of combat
resolution, or catching an enemy character/monster that flees
from combat, for example, do not count.

Enemy models targeting a model with the Mark of Nurgle in close combat suffer a -1 penalty To Hit.

Special regenerate saving throw after it has failed any armour save instead of a ward save
Roll a D6, 1-3 wound affects normally, 4-6 the wound is discounted
Flaming Attacks cannot be regenerated

Also cause fear

Attacks wound automatically on a to-hit roll of 6.

ERRATA:
Change “[...]this rule has no effect.” to “[...]no Impact Hits
are inflicted.”

Add the following sentence to the end of the third paragraph:
‘“Look Out Sir!” rolls cannot be taken against Impact Hits.’

D3 Hits on charge resolved first in close combat at the strength of the model, with hits distributed as if they were shooting attacks, and any unsaved wounds do count towards combat results.