Wrath of the Architect adds:

In the realm of Tenebrous, where the sun dipped into the horizon and painted the sky with hues of crimson and gold, the land was alive with magic. It was here that the Ember Knights, a group of warriors chosen by the ancient gods, stood as the last line of defense against the encroaching darkness.

The expansion adds two heavy-hitting weapons to your arsenal, each with a unique rhythmic playstyle: