Fan:DeX-Digivolution

DeX-Digivolution (Death-X-Evolution in Japanese version) is the version of X-Digivolution which allows to digivolve into stronger X-Digimon called DeX-Digimon whenever the Digimon is nearly dying. DeX-Digivolution is also known as The X-Digivolution's Last Hope which Dorumon digivolve into DexDorugamon.

Effects
However, because of DeX-Digivolution just like X-Digivolution, whenever every Digimon's negative emotions causes the Digimon digivolve into DeXB-Digimon (in this case, Sayumon dark digivolve into Sayonamon Vicious Mode.

Trivia

 * Based on Death-X Evolution, but it has entire different plot.