Bludgeon Expertise is a heroic tier feat available to all player characters.
A character with the Bludgeon Expertise feat gains a feat bonus to weapon attack rolls using a hammer or mace equal to +1, or +2 at 11th level, or +3 at 21st level. You also gain a +1 feat bonus to the number of squares you push or slide creatures with weapon attacks you make with a hammer or mace