"Aaaargh!"
Rog cried in sheer agony as his left arm was chopped off of him by Eren's sudden attack. His leg was injured so he couldn't get away from him even if he knew his opponent was coming for him.
Eren's weapon arts had improved over time. He could handle his blade better. His lightning-coated mana had taken its lethality to a completely different level.
The assassin was not proficient in front combat. His movement spell was his most effective advantage. And that had been compromised. So all he could do was defend himself to the extent of his abilities while holding his ground.
Clang! Clang! Clang!
Eren exchanged a few moves with Rog before deciding to apply Jeet Kune Do in a free-flow manner. He saw that his attack had pushed the assassin's only arm back. Eren saw his chance and he took it.