Complete Darkness

The caster creates a 10' radius field of intense Darkness centered on a point up to 30 feet away that they can see.  This field is unmoving.  Creatures cannot see through this field via any sight, even truesight, though blindsight and tremorsense operate normally as it does not require vision.  A creature inside the sphere of Complete Darkness is effectively blind.  The field remains as long as the caster can maintain concentration.