Oath of Knowledge
Knowledge is power, and on the battlefield it can mean the difference between anticipating a foe’s attacks and being caught off guard. Many Battle-Brothers study the Imperium’s foes to learn their strengths and weaknesses so they may better kill them in combat. However, the Imperium’s foes are near infinite and a Battle-Brother’s time is not.
Prerequisite: Librarian or Apothecary
Effect: Those who take the Oath of Knowledge endeavour to learn all they can of their foes. A Kill-team which takes this oath may choose a single kind of foe (i.e. Ork, Tau, Tyranid), and for the duration of the Mission all members of the team will gain a +10 to Weapon Skill and Ballistic Skill Tests against this chosen enemy with ranged or melee weapons.
Alternatively a Librarian who takes the Oath of Knowledge (or is part of a Kill-team which selects it) may instead choose to study their powers more exhaustively and steel himself against the perils of the warp. This grants the Librarian the ability to re-roll the results of any rolls on Table 6–1: Psychic Phenomena (see page 187) for the duration of the Mission.
Squad Mode Abilities: Go to Ground, Dig In and Strongpoint.