This reaction allows a character to take advantage of an opening to make a melee attack (max 2 attacks per round) against an opponent when they are vulnerable. Attacks of Opportunity are resolved before the action they are being made in reaction to is resolved. Any character may use a reaction to make an Attack of Opportunity without interrupting their current action, but they must be able to see their target. An Attack of Opportunity may be triggered by the following:
- Approach: When an opponent moves closer to the character within their melee range (such as from 3 meters away to 2 meters away against a 3m range weapon).
- Ranged Attack: When an opponent makes a ranged attack within the character’s engagement range.
- Ready: When an opponent readies a weapon, reloads a weapon, or drinks a Potion within their melee range. If the opponent does so as a Free Action, it does not allow for an Attack of Opportunity (Reaction).
- Retreat: When an opponent voluntarily moves out of the character’s melee range without taking the Disengage (Primary Action) action.
- Spellcast: When an opponent casts a spell within their melee range (unless the spell counts as a melee attack).
- Standing Up: When a Prone character stands up within their melee range without using the Arise (Special Action) action.