Heroic Reactions

Core Rules v2 p. 14

Reactions cost 1 action and are generally performed when it is not your turn. A hero can perform each reaction no more than 1/round, and they will start their turn with fewer actions. The reactions are:

FAQs

1

How do defensive and reaction spells affect their trigger?

Official

Core Rules v2 p. 55

Reactions resolve before their trigger. So if an attack was made but the attacker is now Poisoned/Frightened/Blind/etc. the attack is rolled again, but taking into account the condition (rolling with disadvantage). You can only cast 1 defensive spell each time you Defend (e.g., Frost Shield OR Alacrity, not both on the same round).

Related Rules

6
DefendCombat / Reactions
HelpCombat / Actions
Heroic ActionsCombat / Actions
InterposeCombat / Reactions
Opportunity AttackCombat / Reactions
Turns, Rounds & EncountersCombat / Encounter Flow