In "Catechism," Batman heads to Rome to stop Ra's al Ghul and the League of Assassins from getting their hands on an ancient artifact that they want to use to increase the power of the Lazarus Pits. What Batman doesn't know is that the artifact is already under the protection of the Order of St. Dumas, specifically Azrael! From the creative team of critically acclaimed writer Brandon Easton and rising-star artist Karl Mostert!