The 'Do Not Cite the Deep Magic to Me, Witch' meme originates from the 2005 film The Chronicles of Narnia: The Lion, the Witch and the Wardrobe. In the scene, the lion Aslan shuts down the White Witch's attempt to claim a traitor by citing the ancient laws of Narnia, famously replying that he was present when the Deep Magic was written. The meme gained traction as a perfect reaction image for dismissing people who try to explain a topic to someone who has far more experience or seniority in that field. It is a staple for long-time community members who find themselves being lectured by newcomers on subjects they helped create or popularize.