Weapon Focus

Benefit: Choose a weapon group, such as spear or heavy blade. You gain a +1 feat bonus to the damage rolls of weapon attacks that you make with a weapon from that group. This bonus increases to +2 at 11th level and +3 at 21st level.
Special: You can take this feat more than once. Each time you select this feat, choose another weapon group.

Published in Player's Handbook, page(s) 201, Heroes of the Fallen Lands, page(s) 319, Heroes of the Forgotten Kingdoms, page(s) 321.