Bzzt. Swoosh. Pull.
Eren tapped the weapon spells of his two axes and let them fly away from his grip willingly. He had adjusted his release in such a way that they would fly toward his opponent at the time.
When the weapons flew past Ariadne, Eren tugged at them by pulling the lightning whips they were attached to. He forced them to change their direction and approach Ariadne from two separate directions.
Eren adjusted the length and force behind his lightning whips in real time as he approached Ariadne from the front. It allowed him to change the direction of his weapons and make them cover a large area with their changing orientation and direction. As a result, a three-pronged attack had been initiated against the demonic ranker.
Eren had digested the memories of various martial arts and weapon arts. He employed those memories in the play as well, giving his newly devised strategy a deadly edge.