OZ-13MS Gundam EpyonA Gundam-typeMobile Suitdeveloped byTreize Khushrenadabased on theTallgeeseand 5 Operation Meteor Gundams. True to Treize's philosophy of combat, it was only armed with melee weapons: a heat rod and a very high-output, largeenergy swordthat is capable of destroying space fortresses. It also possessed the ability to transform into a flight mode (with a twin-headed dragon design), and was equipped with the fearsomeEpyon System, a modified version of the ZERO System that enabled its pilot to control the battlefield. While it was originallyHeero Yuythat relieved Treize of the Epyon, he later exchanges the unit for theWing Gundam ZerowithZechs Merquiseafter a brief scuffle.