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

Emanation [Area of Effect]

Source: XPHB

An Emanation is a special kind of Area of Effect that radiates from a creature or an object in a set radius in all directions, moving with its source and, unless noted otherwise, filling in the space around corners.

Unlike a Sphere, an Emanation can affect the creature or object it originates from, and it isn't blocked by total cover.