Editing Warhammer 40,000/8th Edition Tactics/Space Marines (section)

====Litany & Psychic Discipline - Umbramancy====
As a discipline, Umbramancy focuses on shadows, disruption, and making your solo-operators more deadly. Its two mortal wound powers are somewhat weak, but the rest of the powers are fairly solid, if somewhat limited by targeting restrictions. Two of the powers (Umbral Form and Spectral Blade) only affect your librarians themselves, while a third (Shadowstep) only affects characters, and the last (Enveloping Darkness) can only affect a single enemy unit. Nevertheless, there are several combos that present themselves (The Abyss + Spectral Blade), (Spectral Blade + Umbral Form), (Shadowstep + Enveloping Darkness/The Abyss/Smite), (Spectral Blade + Enveloping Darkness + a unit of Reivers).

#'''Umbral Form''': Warp Charge 5. The psyker gains a 4++ Invulnerable save.
#'''Enveloping Darkness''': Warp Charge 7. One visible enemy unit within 18" cannot fire Overwatch and subtracts one from their hit rolls. Basically a psychic Shock Grenade, which stacks.
#'''Spectral Blade''': Warp Charge 5. Until the start of the next psychic phase, the psyker's Strength is equal to their Leadership. In addition, they have AP-4 when resolving an attack against a unit with a lower Leadership. In most cases, this will make your Librarian Strength 9, and you can guarantee the AP bonus by using one of the numerous Leadership penalty sources available (suddenly, Fear Made Manifest gets better as a warlord trait).
#'''Shadowstep''':  Warp Charge 7. One {{W40kKeyword|Raven Guard Character}} within 18" of your Librarian redeploys wherever he wishes while 9" away from the enemy. Once again, it can be used to send a Chaplain to support infiltrated Marines, or to teleport around a Terminator or Gravis Smash Captain.
#'''The Abyss''': Warp Charge 6. Select one visible enemy unit within 18". Roll 3d6; for each each roll of 4+, the target takes a mortal wound. If any models are destroyed, then the unit suffers a -1 penalty to their leadership for the rest of the turn.
#'''The Darkness Within''': Warp Charge 6. Select up to 3 enemy units within 18"; roll 1d6 for each unit. On a 4+, they take a mortal wound. If you rolled a 10 or higher on the psychic test, add 1 to the d6 rolls.

'''Litanies of Battle - Swift as the Raven:''' Raven Guard within 6" can fall back and shoot, and also charge that turn if they can Fly.
*Inceptors want to tie up units that cannot fight them back, like small troop squads and vehicles, to hide from enemy shooting or force them to fall back. This litany lets them do just that. Let the Chaplain give +1 to hit to their Plasma Exterminators for safe plasma supercharge, and use Swift as the Raven when they reach the enemy. They are the only flying unit that can both shoot and melee, more than Suppressors. If you can get over the autism of mixing a manlet Jump Pack Chaplain with Primaris Inceptors, that is.