The Shadow didn't give Eren a chance to breathe as he followed after him. All attacks were useless on him, so it was impossible to stop it.
"What an absolute mess," Eren realized that physical attacks were useless on the Shadow Warrior.
If it wasn't for his seventh sense, making him observe his complete surroundings, he was sure he would have been assassinated already.
The Shadow appeared in front of Eren who tried to block the dagger. The shadow dagger passed through his sword, coming towards his shoulder again.
He dodged the dagger, which still managed to slice through his shoulder. Fortunately, it only managed to leave a shallow wound.
"If physical attacks don't work, then let me shove something else in your mouth!"
He made the Sword disappear, which was completely ineffective against the shadow. He could surround the sword with the poison using his pendant, but that was like using a nuclear bomb to kill a chicken.