The X-Ionizer is a secret government project able to sharpen bladed weapons to be capable of cutting through incredibly dense materials, even Kryptonian flesh. Henry Yarrow and Alec Rois stole the X-Ionizer and created Rako's sword with it. Through unknown circumstances, Sensei eventually came to be in possession of the sword.
- ↑ Weisman, Greg, Kevin Hopps (w). Jones, Christopher, Carrie Strachan (p). Davis, Dan (i). Atkinson, Zac (col). Sienty, Dezi (let). Chadwick, Jim (ed). "Hot Case" Young Justice 10 (November 16, 2011), New York, NY: DC Comics
- ↑ Fialkov, Joshua Hale (writer) & Hueck, Vinton (director) (January 11, 2019). "Rescue Op". Young Justice. Season 3. Episode 6. DC Universe.