Sorcerer on Palanquin of Nurgle [Legends]

While a Bodyguard unit contains a Leader, it is known as an Attached unit and, with the exception of rules that are triggered when units are destroyed (pg 12), it is treated as a single unit for all rules purposes. Each time an attack targets an Attached unit, until the attacking unit has resolved all of its attacks, you must use the Toughness characteristic of the Bodyguard models in that unit, even if a Leader in that unit has a different Toughness characteristic. Each time an attack successfully wounds an Attached unit, that attack cannot be allocated to a Character model in that unit, even if that Character model has lost one or more wounds or has already had attacks allocated to it this phase. As soon as the last Bodyguard model in an Attached unit has been destroyed, any attacks made against that unit that have yet to be allocated can then be allocated to Character models in that unit.

Each time the last model in a Bodyguard unit is destroyed, each CHARACTER unit that is part of that Attached unit becomes a separate unit, with its original Starting Strength. If this happens as the result of an attack, they become separate units after the attacking unit has resolved all of its attacks. 

Each time the last model in a CHARACTER unit that is attached to a Bodyguard unit is destroyed and there is not another CHARACTER unit attached, that Attached unit’s Bodyguard unit becomes a separate unit, with its original Starting Strength. If this happens as the result of an attack, they become separate units after the attacking unit has resolved all of its attacks. 

Each time a unit that is part of an Attached unit is destroyed, it does not have the keywords of any other units that make up that Attached unit (unless it has those keywords on its own datasheet) for the purposes of any rules that would be triggered when that unit is destroyed.

If your Army Faction is DEATH GUARD, while an enemy unit is within Contagion Range of this unit, subtract 1 from the Toughness characteristic of models in that enemy unit. Contagion Range changes over the course of the battle, as shown below.

CONTAGION RANGE
1st Battle Round: Contagion Range = 3"
2nd Battle Round: Contagion Range = 6"
3rd Battle Round Onwards: Contagion Range = 9"

During the Declare Battle Formations step, select one of the Sicknesses below. Until the end of the battle, all units from your army with the Nurgle’s Gift ability gain the selected Sickness. 
- Skullsquirm Blight (Aura): While an enemy unit is within Contagion Range of this unit, worsen the Ballistic Skill and Weapon Skill characteristics of weapons equipped by models in that enemy unit by 1. 
- Rattlejoint Ague (Aura): While an enemy unit is within Contagion Range of this unit, worsen the Save characteristic of models in that enemy unit by 1. 
- Scabrous Soulrot (Aura): While an enemy unit is within Contagion Range of this unit, worsen the Leadership and Objective Control characteristics of models in that enemy unit by 1 (to a minimum of 1).’
If you control an objective marker at the end of your Command phase and a DEATH GUARD unit from your army is within range of that objective marker, that objective marker is said to be Infected and remains under your control even if you have no models within range of it, until your opponent controls it at the start or end of any turn. In addition, while an objective marker is Infected and under your control, it has the Nurgle’s Gift ability as if it were a unit from your army (so enemy units within Contagion Range of it will have their characteristics modified).

DEATH GUARD INFANTRY units from your army that are not embarked within a TRANSPORT have the Scouts 5" and Stealth abilities.