General | Combat Stamina
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Martial Mastery (Combat) Source Advanced Race Guide pg. 78 You broaden your study of weapons to encompass multiple similar weapons. Prerequisites: Martial Versatility, fighter level 16th, human. Benefit: Each combat feat you have that applies to a specific weapon (e.g., Weapon Focus) can be used with all weapons in the same weapon group. Combat Trick (from the Combat Stamina feat) Source Pathfinder Unchained pg. 126 At the start of your turn, you can spend 5 stamina points to apply the feats to another weapon that is not of the same weapon group. You gain this benefit until the start of your next turn.

Martial Mastery (Combat)

Source Advanced Race Guide pg. 78
You broaden your study of weapons to encompass multiple similar weapons.

Prerequisites: Martial Versatility, fighter level 16th, human.

Benefit: Each combat feat you have that applies to a specific weapon (e.g., Weapon Focus) can be used with all weapons in the same weapon group.

Combat Trick (from the Combat Stamina feat)

Source Pathfinder Unchained pg. 126
At the start of your turn, you can spend 5 stamina points to apply the feats to another weapon that is not of the same weapon group. You gain this benefit until the start of your next turn.

Archives of Nethys

Martial Mastery (Combat)

Combat Trick (from the Combat Stamina feat)