Galahad, Shield of the Round Table debuts as a limited time character

Galahad, knight of Arthurian legend. "The greatest," they called her. The only one who ever reached the Holy Grail. And so they all lived happily ever after? If only it were so easy. What she learned of the Grail's "Miracle" was a cruel truth: no wish comes without a price. So she would become its eternal shield. An impenetrable wall guarding the Grail. To keep its cruelty in check. Forever.