General | Combat Stamina
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Merciless Butchery (Combat) Source Advanced Class Guide pg. 152 Your talent for slaughter lets you dispatch helpless opponents before they can recover. Prerequisites: Dastardly Finish, sneak attack +5d6, studied target class feature. Benefit: As a standard action that does not provoke attacks of opportunity, you can attempt a coup de grace against a cowering, helpless, or stunned opponent that you have designated as your studied target. Combat Trick (from the Combat Stamina feat) Source Pathfinder Unchained pg. 127 You can spend 10 stamina points when you use this feat to increase your weapon’s critical multiplier by 1 (×2 becomes ×3, and ×3 becomes ×4) for your coup de grace.

Merciless Butchery (Combat)

Source Advanced Class Guide pg. 152
Your talent for slaughter lets you dispatch helpless opponents before they can recover.

Prerequisites: Dastardly Finish, sneak attack +5d6, studied target class feature.

Benefit: As a standard action that does not provoke attacks of opportunity, you can attempt a coup de grace against a cowering, helpless, or stunned opponent that you have designated as your studied target.

Combat Trick (from the Combat Stamina feat)

Source Pathfinder Unchained pg. 127
You can spend 10 stamina points when you use this feat to increase your weapon’s critical multiplier by 1 (×2 becomes ×3, and ×3 becomes ×4) for your coup de grace.

Archives of Nethys

Merciless Butchery (Combat)

Combat Trick (from the Combat Stamina feat)