Imperial Sword School (Pathfinder Feat)
From D&D Wiki
Imperial Sword Style [Combat, Style]
The Imperial Sword School teaches a fluid and malleable style, allowing users to swap to different variants of its style as the users need.
Benefit: As an Immediate Action, you may switch to a different combat style, so long as your current combat style, and the one you switch to are both Imperial combat styles.
Normal: Switching combat styles is a Swift Action.