Surtr S2 is a Hasbro Exclusive Energy Layer released as part of the Burst System as well as the Dual Layer System. It debuted in western countries with the release of the Surtr S2 & Odax O2 Dual Pack.
Surtr S2 is an Attack Type Energy Layer that has an overall triangular shape. Its design consists of a top-layer made of clear plastic that features three jagged blades with flame-like designs, and a bottom-layer made of colored plastic that has numerous stone-like protrusions that has a round design. In the center of the Layer is a sword engulfed in flames, with a golem-like head off to one side of the center rim, representing the Layer's namesake; Surtr, the colossal fire giant of Norse mythology.