'SPITEFUL STRIKE'
Syntax: spite
(Requires a small cost of HP to increase damage)
In contrast with the self-righteous paladins, who believe they are doing
the lord's work as they punish and condemn evildoers, upholding an oath and
fighting with honor, a dark-knight's sense of entitlement leads them to feel
easily grieved, and retaliate out of pure spite.  Channeling icy anger into
their weapon, the dark-knight slashes their victim, opening a freezing
wound.  While the wound remains open, their blood may experience more
trouble circulating, causing an overall reduction in all physical healing,
and some trouble fleeing.  Should the dark-knight have a combat style
advantage their hatred may fuel their spiteful attacks further.
 
See also: 
INFAMY