Defensive Stance
You deny multiple foes the advantage of their numbers.
Preqrequisite
Base attack bonus +6
Benefit
When you fight defensively while wielding a shield or a melee weapon with the block special ability, you gain the unflankable universal creature rule until the start of your next turn.
Source
Starfinder Enhanced pg. 106
Dragonscript
ID
880f41045ab7af24ead0b20f
Preqrequisite
condition character.bab.featPrerequisite >= 6;