Dark Heresy - Paths of Faith
As well as being able to manifest specialised psychic abilities many pskers are able to influence the power of the Warp in a far more general manner.
The following rules apply only to character with a Psy-Rating, including those who may have effective Psy-Ratings through Sorcery talents.
The following special set of actions is available to any Psyker/Sorcerer (blocker) when an enemy Psyker/Sorcerer (manifester) manifests a power/arcana or attempts to cancel a manifesting power;
- The blocker spends a half action for this turn, if they have already acted then they must spend their reaction/s and loose a half-action on their next turn. This means a blocker can potentially block a maximum of two manifesters in a single turn. If the blocker is unable to spend these actions, for example they have already acted and have made a reaction in this turn they may not attempt to block. A Psyker/Sorcerer may ready a half-action in their turn to attempt to a block later in the turn.
- If the requisite actions are spent then the blocker makes a Psyniscience/Forbidden Lore Daemonology or Warp check. If successful they may add their Willpower Bonus in the following actions and the GM must also reveal the effective Psy-rating of the manifester.
- The manifester makes a Power Roll as normal. If the manifester fails to manifest because he simply did not roll high enough to meet the relevant psychic threshold then the blocker may immediately manifest a non-sustained Minor Psychic power for free.
- Assuming the manifester does successfully roll equal to the relevant psychic threshold. The blocker may then Cancel or Hinder (blocker’s choice).
Cancelling – The blocker makes a Power Roll but may roll only a number of dice equal to his effective Psy-rating (plus his WP bonus if his Psyniscience/Forbidden Lore Daemonology or Warp check was successful; a Sorcerer instead adds double their Willpower bonus for their Power Roll as sorcery inherently causes disruption in the Warp). The blocker may not benefit from any talents, traits or equipment to increase his Power Roll total. The blocker cannot cause Psychic Phenomena with this roll.
- If the blocker’s Power Roll total is greater than the manifester’s then the manifesting power is cancelled and does not occur.
- If the blockers Power Roll total is lower than the manifester’s the manifesting power occurs as normal (the blocker also may not make any reactions in response to the manifested power (if applicable) as the feedback momentarily disorientates them).
- If the Power Roll totals are the same then the power is cancelled and does not occur but the blocker must also roll on the Psychic Phenomena table with +25 on the roll, note this stacks with the rules for sorcerers (and the blocker and manifester would both add to this roll if they were sorcerers). If the result of this roll specifies ‘the Psyker’ both the blocker and manifester are included.
Hindering – The blocker makes no Power Roll and instead subtracts from the manifester’s Power Roll total his Psy-rating (plus his WP bonus if his Psyniscience/Forbidden Lore Daemonology or Warp check was successful; a Sorcerer instead adds double their Willpower bonus).
Note; It is possible for multiple characters to attempt to hinder or block a single manifester.
Any Psyker (or sorcerer) may, as a half-action or full-action on their turn attempt to identify and dismiss an ongoing psychic effect (or arcana). This attempt can be boosted with a successful Invocation check as per normal rules
The Psyker or Sorcerer makes a Psyniscience/Forbidden Lore Daemonology or Warp check (if taken as a full-action this check is at +20). If successful they identify the Threshold of the ongoing effect and may then make a Power Roll, which can cause Psychic Phenomena as usual, with the following additions;
- A Sorcerer automatically doubles their Willpower bonus for their Power Roll.
- If the ongoing effect is a power drawn from a psychic discipline that the Psyker possesses then they double their Willpower Bonus for their Power Roll.
If their Power Roll total is equal or greater to the Threshold of the ongoing effect it immediately ends. If their Power Roll total is less than the Threshold they have failed to dismiss it and the effect continues (the psyker may try again the following turn).