D&D 5E (2014) Looking For Samurai Trope Abilities

[LapBandit]

Single Cut

Your use your Action to make a single advantaged attack. If the attack hits it is an automatic crit.

Hold the Pose

You can use your Bonus Action to hold the pose after you critically hit gaining temporary HP equal to your level.

 

[MichaelSomething]

Go watch Rurouni Kenshin for inspiration.

http://www.imdb.com/title/tt0182629/