Detect thoughts

Detect thoughts, also known as ESP, was a divination spell that allowed one to "listen" to surface thoughts.

Effect
The caster was able to sense the surface thoughts of beings within range. How long they examined an area or subjected decided what kind of information was received. It could penetrate barriers, but 30 cm (1 ft) of stone, 2.5 cm (1 in) of common metal, a thin sheet of lead, or 1 m (3 ft) of wood or dirt blocked it. The spell worked across the void of wildspace, but could not penetrate crystal shells at all.

The post–Second Sundering version of the spell also allowed the caster to detect the surface thoughts of a creature and "detect" where they were. This spell could be used for interrogation and also to probe deeper into the target's mind. The spell could not detect or read the mind of very unintelligent creatures or creatures that did not speak any language. The spell reached 30 feet, and lasted 1 minute but could not penetrate 3 ft (91 cm) of wood or dirt, 2 ft (60 cm) of stone, 2 in (5 cm) of regular metals, or a thin layer of lead.

Components
The spell required verbal, somatic, and material components. The material required was a copper piece.

History
The spell was attributed to Netherese arcanist Zahn in -924 DR and was originally called Zahn's ESP.