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Stay Down! 
Feat 14
Source Pathfinder Advanced Player's Guide
Prerequisites master in Athletics
Trigger A Prone foe within your reach Stands.
You have ways of keeping your foes down. Attempt an Athletics check against the triggering foe's Fortitude DC. On a success, they don't stand up and remain prone. On a critical success, they can't Stand until their next turn.
Traits
Common
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
RogueThis indicates abilities from the rogue class.