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Fortifying Knock 
Feat 2
Source Pathfinder Impossible Magic
Requirements You are wielding a shield.
Your shield is a natural canvas for your art. In one motion, you Raise a Shield and Trace a Rune on your shield.
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.
FlourishActions with the flourish trait are special techniques that require too much exertion for you to perform frequently. You can use only one action with the flourish trait per round.
RunesmithThis indicates abilities from the runesmith class.