was the barrier beyond which Demons
had been banished.
Before the birth of the New World
, there had been a great war between good and evil which the Elves
finally won by creating the Ellcrys
and a Forbidding that banished the Demons
into a timeless dark.
All who had followed or sworn to the Void were imprisoned there.
The magic of the Ellcrys held the Forbidding in place, preventing the from Demons escaping.
Grianne Ohmsford was banished beyond the Forbidding during Shadea a’Ru‘s attempt to take over the Druid Council
The Shannara Chronicles
The Chosen Part 1
When Eventine Elessedil recounted the story of the Ellcrys at the Chosen ceremony, he stated the Forbidding was the realm to where the Demons had been banished.