All Legendary Engrams, as well as Rare Engrams, acquired from the new Fallen Public Event chests will not be recognized by the Cryptarch. Hang on to these engrams in time for the release of the House of Wolves and he will be able to decrypt them on release. [url=https://www.bungie.net/en/Forum/Post/121703802/0/0][b]You can read more here.[/b][/url]