The Chronicles of Chronology
Ultimately, the beliefs of the Doomguard come down to one fact: everything ends. No matter how great a creation you can construct, it’s sure not to last eternally. Even the planes themselves will eventually crumble over the weight of time; look at the shifts of the Inner Planes, after all, or the state of Poe. It cannot be stopped, only delayed, and there’s no arguing with that fact. So why argue with it; instead, one should embrace it, and acknowledge that all things are passing. The Doomguard believes it needs to speed up the process of Entropy, and works to destroy all things.