Resonant Echo

Resonant Echo is a dunamancy spell created by Essek Thelyss.

Spell description
As an action, the caster can make a shadowy clone of themselves, referred to as an "echo". They can use the echo to cast one spell. The echo then vanishes after using that spell. It has a limited number of hit points, but greater than thirteen.

Trivia

 * An ability similar (although not identical) to the spell, known as "Manifest Echo", is a feature of the Echo knight Fighter subclass, which was included in the Explorer's Guide to Wildemount. The spell does not appear in the book.

Appearances

 * Critical Role — Campaign 2: The Mighty Nein
 * . Lythir uses an echo consistent with the description of this spell.