Graze

When you miss with an attack, that attack still deals some damage.
(The damage type is normally the same as the attack. If there are multiple damage types, use the one that deals the most damage).

Damage bonuses apply to this ability, but the damage a graze can deal is capped.
It can only deal 5 damage, or 10 damage with a heavy weapon at most.
A Graze with a Heavy Attack is capped at twice as much damage.

Poisons:
Poison damage does not count toward Graze’s damage cap.
If you deal damage to a target with Graze, treat that miss as a hit for the purposes of triggering the effects of any poisons on your weapon.

(Note that Power Attack only adds damage to attacks which hit.)