es obra de

is the work of

→ ser
phrase Rare #40,656
is the work of Used to attribute something to a person or group, meaning that they created it or are responsible for it. It can refer to artwork, actions, or events.
SP: Este hermoso mural es obra de una artista local.
EN: This beautiful mural is the work of a local artist.

Esto es obra de Dios.

This is God's work.

Eso es obra de un puñado de fascistas.

That’s the work of a handful of fascists.

Sospecho que es obra de piratas.

I suspect it’s the work of pirates.

Esta mierda es obra de los zombis y debemos estar preparados.

This shit is the work of zombies, and we need to be prepared.

— Los muertos no mueren (2019)