Dark fantasy novel I've been trying to find for ages. /s

[Kris]

I apologize that I have nothing to offer except that now I want to read it!

Even though you said it was a novel, it sounds very much like the plot for a Japanese manga series.

[Tab]

Was the main characters special powers ice/water related?

Who were some of the people he killed (neighbors, govt workers, etc)?

Was this for adults, teens, or children?

Anything about the cover?

[Tab]

Sounds like The White Tribunal by Paula Volsky

[Tab]

Description of above book

The White Tribunal, the all-powerful witch-hunting body headed by self-righteous Premier Jurist Gnaus liGurvohl, tortures and executes young Tradain liMarchborg's father and brothers on trumped-up charges, then throws the boy into prison. Thirteen years later, Tradain escapes. Through an illegal alliance with supramundane presence Xyleel, he wreaks vengeance on the false informers and on the Tribunal itself.

[Sophie]

The White Tribunal for the link.