Interposing
Level
5
You can add the interposing fusion only to a melee weapon. Developed and popularized by the Knights of Golarion, this fusion generally adds shining sword icons to the weapon. Whenever you hit an enemy with an interposing weapon, you and all adjacent allies gain a +1 enhancement bonus to AC against that enemy’s melee attacks until the beginning of your next turn.
Source
Pact Worlds pg. 194
Dragonscript
ID
f710bb9fe18f18ff7c76b1b6