The Order of Scribes wizard sublass has the Manifest Mind feature (TCoE, p. 78), which creates a manifested spectral mind that can be moved by the wizard as a bonus action. Additionally, the wizard can cast spells through the spectral mind:
Whenever you cast a wizard spell on your turn, you can cast it as if you were in the spectral mind's space, instead of your own, using its senses.
This allows the Scribes wizard to cast a spell remotely through the spectral mind.
The spell witch bolt (PHB, p. 289) can be cast through the spectral mind, but it is not clear to me whether its damage can be repeated if the spectral mind is within 30 feet but the wizard is more than 30 feet away. The problematic part of the spell description is the following:
The spell also ends if the target is ever outside the spell's range or if it has total cover from you.
Is the target considered "outside the spell's range" if the spectral mind is within 30 feet of the target, but the wizard isn't?