In issue #1 of the Trinity miniseries, a mysterious man, whose face is half-obscured by a metal mask and who is wielding a powerful staff, joins forces with Morgaine Le Fey. His true name is unknown, but he takes the moniker "Enigma", from what Le Fey initially called him.
In the first episode of the Trinity miniseries, a mysterious figure wearing a metal mask and wielding a staff teams up with Morgaine Le Fey.  His real name remains a secret, but he chooses to be known as "Enigma," a moniker given to him by Le Fey in the beginning.