Master of Maces

is one of the weapon disciplines, which were revealed on May 18th, 2017.

Can be equipped by

 * Assassin
 * Champion
 * Cleric
 * Knight
 * Myrmidon
 * Ranger
 * Templar

There are still Legionnaire, Stalker and Forgemaster in the list of who can equip this discipline. This most possibly will change with the new concept and the obsolete Archetypes.