Repertoire of Shadow Spells
Shallot's Mirror + Shadow Clone.
Using his Soul Sense, Eren accessed his Soul Space and located what he sought.
Within a void expanse in his Soul Space, a spectral mirror form floated serenely. This apparitional reflection of the mirror symbolized Eren's connection with Shallot's Mirror.
Leveraging his Soul Sense, he tapped into the artifact's power, and almost instantaneously, a circular mirror shape manifested on his right palm.
As the shadow clone materialized before him, Eren lifted his hand and projected his intent onto it. The surface of the illusory mirror exuded a faint light as it reflected Eren's intent. In an instant, the shadow-element clone coalesced into existence, gaining a semblance of awareness.
Eren's Shadow Clone mirrored his body size, stature, and even his attire's silhouette, hairstyle, and facial features. However, its constitution was an opaque black substance, solidified pure shadow-element mana.