I am unclear if this requires a regular stanza poem or a haiku, I have provided both, with the stanza poem being my submission if the bit about a haiku wasn't making it required.

Haiku:
Cold fire within
Betrayer looms in shadows
Wrath not yet sated

Regular Stanza Poem:
It should have been expected, to trust and be betrayed
I should have seen it coming, but my mind was far too pained.
The selfish Dragon did as needed, for Arcona to be saved,
I understand but don't forgive, Krath's vengeance must be sated.