Orpheus O2 is an Energy Layer released by Hasbro as part of the Burst System as well as the Dual Layer System. It debuted in western countries with the release of the Orpheus O2 & Unicrest U2 Dual Pack.
Hasbro's Orpheus O2 is a symmetrical Defense Type Energy Layer that’s round in shape. Its design consists of two sloped blades made of colored plastic that go from the front to the back; with each one having a gap at the front, two orb-like designs made of clear plastic that are near the back of the Layer, three clear spikes at the back of the Layer, akin to Treptune, and string-like designs that run down the center of the Layer. Along with a face on the front side of Orpheus O2, its design resembles a lyre, representing the Layer's namesake; Orpheus, a musician in Greek mythology.