Assassin

These troops are skilled at sneaking forwards to scout out the enemy before the main force arrives. By making the best use of cover, advancing at night, or with other troops providing a diversion, they are able to deploy ahead of the rest of the army.
Scouts are set up after both armies have been deployed. They can be set up anywhere on the table, at least 10" away from the enemy and must be out of the sight of any enemy troops and in or behind interposing terrain (not out in the open!). If both armies contain troops with this ability, each player should roll a D6, with the player scoring the highest choosing whether he deploys before or after the enemy's Scouts. Two opposing groups of Scouts cannot be set up within 10" of each other.
Alternatively, Scouts can be placed on the controlling player's deployment zone like any other troops, after deployment of both main armies is finished.

Reroll missed hits on first round of combat.

If you wish, any Assassin in your army may start the game hidden in one of the following units: Witch Elves, Warriors, Corsairs, Executioners or Black Guard. Alternatively, he may deploy as a Scout.
Hidden Assassins are not placed on the table, but are assumed to move along with whatever unit they are with. At the start of the game, make a note of which unit they are hidden in. If the unit is wiped out or flees off the table before the Assassin is revealed then the Assassin is lost and Victory points are scored as normal. Before he is revealed, there is no other way the Assassin can be harmed.
Hidden Assassins may be revealed at the beginning of any of your turns or at the start of any Close Combat phase. The player declares that his unit contains an Assassin and places the model amongst the ranks where he can fight, displacing a normal rank-and-file model. If there are no such models in the front rank, the Assassin is placed in the second rank until there is enough room for him in the first rank. Assassins always strike first in the round of hand-to-hand combat they are revealed, even against chargers. If an enemy model is also entitled to always strikes first, the model with higher Initiative strikes first (roll a D6 if they have equal Initiative).

Units in the army can never use their Leadership value and an Assassin can never be the General of the army (therefore your army must include at least one other character to act as the General).