Reference

Actions, combat rules, conditions, skills, feats and languages. Search by name.

During play

Actions Every combat action and what it does: Attack, Dash, Disengage, Dodge and more.

Conditions Every condition and what it does to a creature

Combat Rules Cover, advantage and the core combat rules

For your character

Feats Character feats from every source, with their prerequisites.

Skills Skills and the abilities behind them

Optional Features Eldritch invocations, maneuvers, metamagic and fighting styles

Languages From Common to Abyssal, with their scripts

Deities Gods by pantheon, with alignment, cleric domains and symbol

Combat Rules

Heroic Inspiration

Source: XPHB

Heroic Inspiration represents a character's supernatural favor, which can help them succeed in combat, on ability checks, or on saving throws.

If you have Heroic Inspiration, you can expend it to reroll any D20 Test after seeing the roll but before any effects of the roll occur. You must use the new roll.

You can have only one instance of Heroic Inspiration at a time; gaining it again while you already have it has no effect.