The Black Night and Nigel's Ninja outfits are clothing sets available for Battlefunds. Since it first appeared as a battlefunds monthly exclusive, they reappeared and featured for a long while as a hot deals bundle. It is actually the second ninja outfit of the Royals.
The bundle was released September 2009.
Ninja history including the clothing changes and martial art comparison: http://www.battlefieldheroes.com/forum/showthread.php?tid=66057
Resold 28th November 2011 within the Heroes of the Rising Sun theme.