Well he didn't really do anything to it, Pope Innocent III annulled it, leading the First Barons war. (First barons war was a war between England, and rebels, the rebels were supported by France, and Scotland.)
His son, and grandson however kept reissuing the Magna carta to make changes to it,
I would have to say annulled even though he never actually did it, but the only thing to occur within his reign was the annulling of the document by the pope.