What would a Knight of Doom's powers be?

As I’ve been talking about for the past few days, if you consider Doom to be represented through Lightning or Poison or something like that Aspect-Power-wise, they’d definitely be able to weaponize that side of the Aspect, buuut this is a tad hard to tell. Other than that, serving through Doom or serving Doom sounds kind of like destruction for the greater good, bringing an End to things.

Alternatively, they may Serve others through Self Sacrifice, sort of like a Human Shield sort of deal, or with powers that hurt them when they use them.