Opportunity Attack or Attack of Opportunity is a Reaction. This ability allows a creature to make a melee 
Attack roll against enemies when they move out of the creature's melee range.
Description
Automatically attack an enemy moving out of your reach.
This is a Reaction. Toggle a Reaction during your turn. It will automatically execute when needed.
Properties
- Range:
Weapon Range
Trivia
The 
Action allows creatures to avoid provoking opportunity attacks.
The Polearm Master Feat allows an opportunity attack when creatures walk into reach if using polearms.
Creatures cannot make opportunity attacks when:
- Wielding ranged weapons.
- Having Conditions that prevent the use of Reactions, such as
, 
, or 
.