Here's why:
* Nunc dimittis is a biblical canticle, specifically a hymn of praise from the Gospel of Luke. It is traditionally sung during evening prayer in Christian churches.
* Merlin is a fictional character, his existence and abilities are part of Arthurian legend. While he is often depicted as a powerful magician, there's no mention of him utilizing any religious hymns or practices.
It's possible that the Nunc dimittis could be misconstrued or misinterpreted to have a connection to Merlin due to its association with religious devotion and themes of acceptance and surrender. However, the hymn itself is primarily a religious text, and its use is largely within the context of Christian worship.