Re: Advantage that triggers save or die roll after use.
This is the Backlash limitation (see Power-Ups 8: Limitations, p. 11 or Powers, p. 104), using Heart Attack as the limitation. "Disintegration" is a special case of Heart Attack, basically - if you die from it, the fact that you happen to crumble into dust rather than leaving a corpse is just a special effect.
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