Ghosar Quintus Broodkin

All Ghosar Quintus Broodkin units that deploy using the Infiltrate USR have the Shrouded USR until the start of their second game turn, and can attempt to charge on their first turn.
In addition, when Patriarch Ghosar and the Purestrain Princelings deploy using their Infiltrate USR, they can be set up anywhere on the table that is more than 1" from any enemy unit, whether deployed units can draw a line of sight to them or not (Patriarch Ghosar cannot do this if joined to a unit, unless that unit is the Purestrain Princelings).

Whilst Patriarch Ghosar is alive, all Ghosar Quintus Broodkin models have the Fearless and Adamantium Will USRs.

Units that contain at least one model with this special rule are deployed last, after all other units (friend and foe) have been deployed. If both sides have Infiltrators, the players roll-off and the winner decides who goes first, then alternate deploying these units.

Infiltrators can be set up anywhere on the table that is more than 12" from any enemy unit, as long as no deployed enemy unit can draw line of sight to them. This includes in a building, as long as the building is more than 12" from any enemy unit. Alternatively, they can be set up anywhere on the table more than 18" from any enemy unit, even in plain sight.

If a unit with Infiltrate deploys inside a Dedicated Transport, they may Infiltrate along with their Transport. 

A unit that deploys using these rules cannot charge in their first turn. Having Infiltrate also confers the Outflank special rule to units of Infiltrators that are kept as Reserves.

If a unit has both the Infiltrate and Scout special rule, that unit can deploy as per the Infiltrate special rule and then redeploy as per the Scout special rule.

A unit that contains at least one model with this special rule counts its cover saves as being 1 point better than normal. Note that this means that a model with the Stealth special rule always has a cover save of at least 6+, even if it is in the open. This rule is often presented as Stealth (X) where X indicates a specific type of terrain, such as Stealth (Woods) or Stealth (Ruins). If this is the case, the unit only gains the benefit whilst it is in terrain of the specified type. Cover save bonuses from the Shrouded and Stealth special rules are cumulative (to amaximum of a 2+ cover save).