Darkmoon Blade

Miracle of those who devoted themselves to the hidden Darkmoon covenant.

Reinforces right weapon with Moon light.

Miracles of the Darkmoon are tales of revenge, but the Captain recites only for the sake of remembering the lost knights and her brother, without knowing the truth behind its meaning. 

Perhaps this is better, as revenge is better left to the Blades.

You invoke the Silver Flame of the Moonmaiden and coat your weapon with Silver Radiance. For the duration your weapons damage becomes magical and deals an additional 1d4 + spellcasting modifer radiant damage. The radiant damage is special and reduces the targets vulnerability to radiant by 1 level (Eg. If immune it is resistant, if nothing its vulnerable).

Using a Lunar Disk or Crecent Disk as part of the spellcasting then the caster chooses between either the damage increasing to 1d12 or the imbued weapon's critical hit range increases by 2 (Eg. if only crits on 20 then it now crits on 18-20; if crits on 19-20 then now crits on 17-20).