Tira's blade in d20.

  I like the Soulcalibur series. One of my favorite characters is Tira. She's like an even crazier version of Harley Quinn. She has this blade that's really a bladed hula hoop. I posted to a Pathfinder to see if someone could stat this weapon. Someone did, and it seems to check out for me.

Bladed hoop: Exotic 2 handed-weapon
2d6 x2/20  S  Trip, Defensive

A bladed hoop is designed to be operated from the inside. It takes a move action to enter the hoop (can be done as part of drawing the weapon). The wielder gets a +2 to their CMD against disarm attempts against the hoop. However, wielding a hoop in this manner limits movement, and gives the  wielder a -2 armor check penalty.

A hoop can be used without being in the center, at which case it looses these special rules, as well as the defensive quality. The wielder also takes a -1 on attack rolls, and must make a DC 15 reflex save or cut by the blade (as chakram)
A bladed hoop can be used with weapon finesse