Wuthering Waves Game Guide

Core Echo I

Each Core Echo has its own Trial. During the duel, you can only add Core Echoes to your hand after completing the corresponding Trial.

Core Echo II

Deploying a Core Echo costs no Energy. It will stay on-hand throughout the duel before being Deployed, but cannot be Reconstructed or Modulated.

Core Echo III

Core Echoes are extremely powerful. It is recommended that you complete the Trial so that you can use the Core Echo to win the duel.