And They Shall Know No Fear Automatically regroup when falling back even when at less than 50%. Enemy advances are treated as a new Assault (enemy striking +1A the following turn). If the enemy does not advance, the Space Marines can move, shoot, and assault as normal in their following turn.
Stubborn The unit will automatically pass any Morale checks they have to take, even if faced by a situation or opponent that would normally cause them to automatically fail. Note that they still must test for pinning as normal.
Howl of the Cursed After a successful psychic test, every enemy squad with at least one model within 6" of the Librarian must make a Morale check or fall back according to the normal morale rules. Units who ignore Morale checks are immune to this power. This power is used instead of shooting. Howl of the Cursed may not be used if the Librarian is engaged in an assault or is falling back. This power replaces the Librarian's Smite.