The character can see and hear a creature, who may be at any distance. The character must succeed at a Scry check to do so. The difficulty of the task depends on how well the character knows the subject and what sort of physical connection (if any) the character has to that creature. Furthermore, if the subject is on another plane, the character gets a -5 penalty on the Scry check.
Knowledge DC
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None* 20
Secondhand (the character has heard of the subject) 15
Firsthand (the character has met the subject) 10
Familiar (the character know the subject well) 5
*The character must have some sort of connection to a creature the character has no knowledge of.
Connection Scry Check Bonus
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Likeness or picture +5
Possession or garment +8
Body part, lock of hair, nail clippings, etc. +10
This spell creates a magical sensor located near the subject. Any creature with Intelligence 12 or higher can notice the sensor by making a Scry check (or an Intelligence check) against DC 20.
You may cast the following spells reliably through the sensor: comprehend languages, darkvision, detect chaos, detect evil, detect good, detect law, detect magic, message, read magic, and tongues.