Nahel Bond

The Nahel bond is a symbiotic bond between humans and certain types of spren.

It is a mutually beneficent relationship that gives the spren a stronger presence in the Physical Realm and the ability to think and remember more clearly in that Realm. Presumably, it also grants the person bound to the spren a stronger presence in the Cognitive Realm, allowing her/him to manipulate Stormlight more potently, as does Lift.

The Nahel bond has been known of since the Heraldic Epochs.