Rend Vision is a 
Action. Dire Ravens use this ability to make a melee attack that deals Piercing Damage to enemies and possibly Blinds them.
Description
Attack a creature's eyes and 
it.
Properties
- Cost:
-
Action - Damage:
-
1d6 (1~6) + Dexterity modifier 
Piercing damage - Details:
-
Attack roll -
Melee: 1.5 m / 5 ft
Condition: Blinded
Duration: 2 turns
- Ranged attacks and spells have a range of
3 m / 10 ft and Attack Rolls suffer 
Disadvantage. - Attack Rolls against Blinded creatures have
Advantage.
How to learn
(Information not yet added.)