Hanafi
The sources give no view for it here.
حقيقة السحر
هل للسحر حقيقة ثابتة؟
Each school’s answer
In our wordsHanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
مسألة: السحر له حقيقة، خلافا لمن نفاه؛ لقوله تعالى: " ولكن الشياطين كفروا يعلمون الناس السحر " ، فجعلهم كفرة بتعليمه فثبت أن له حقيقة.
«الإشراف», al-Qadi Abd al-Wahhab p. 845
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What is «in our words» is our standard wording; the books’ texts stay as they are.