You can sense the use and effects of psionic abilities.

Requirements: Psionic Ability feat, can be used untrained

Psionic Familiarity: The prerequisite to using Psionic Sense to detect a particular psionic skill is having ranks in the skill being detected. Therefore, a telepath can only detect the psionic skills that he himself possesses.

Check: Make a Psionic Sense check to sense a psionic skill in use in your vicinity, to detect and read the psionic “signature” left behind by psionic skill use, or to trace the source of a psionic manifestation.

Sense Psionic Skill Use: The GM makes a Psionic Sense check for you in secret as a reaction whenever a psionic skill is used in your general area. The base DC to sense skill use is 10 or the user’s Psionic Shield check result, whichever is greater, and the DC increases by +1 for every 10 feet between you and the user or subject of the psionic skill (whichever is closer). A successful result means you sense the psionic skill use and know which talent it falls under, but not necessarily the exact skill used. You also know the general direction and distance to the source of the skill and its target, if both are within your range. If you succeed by 5 or more, you know the exact psionic skill used. If you succeed by 10 or more, you recognize the skill user, if known to you.

Sense Psionic Signature: If you have the Clairsentience and Telepathy feats you can sense old uses of psionic skills in a particular area. The base DC is 15 to detect that a psionic skill was used in the area in the past and 20 to determine what talent was used and roughly when. It is DC 25 to know exactly which skill was used and what (or who) it was used on.

Psionic Tracing: You can trace the origin or the target of any psionic skill use that you detect. Each requires a separate skill check. The DC is 10 or the result of the subject’s Psionic Shield skill check, whichever is higher. Distance is not a factor, but you must have detected the psionic skill use before it can be traced. When used on old psionic signatures, this gives you the skill’s origin and target at the time it was used; it doesn’t provide you with information as to their current whereabouts. Any subject that you psionically trace is considered at least casually familiar to you.

Special: You can take 10 or take 20 when using Psionic Sense. Taking 10 requires you to concentrate for a minute and not be engaged in other activities. Taking 20 requires you to concentrate for at least 2 minutes. Taking 10 increases the skill’s strain by 1, while taking 20 increase it by 2.

Time: Sensing psionic skill use and mental contact are reactions, taking no time. Sensing psionic signatures and psionic tracing require a full-round action.

Retry: No.

Strain: 0 for sensing psionic skill use and mental contact, 1 for sensing psionic signatures and psionic tracing.