Eren felt like he was living a second life. The life of someone named Gian.
He witnessed Gian's hardships and his love for his younger brother. He also started experiencing the struggles Gian had to go through as a ranker right from the beginning of the Meta rank.
Eren was absorbing Gian's experiences through his memories. When he opened his eyes after what felt like an eternity to him, everything looked different for a while. It took a while for Eren to come to his senses.
Eren raised his hand and concentrated. In the next moment, red lightning streaks started dancing over his palm. This was not all. Eren manifested the water element next and altered its viscosity to turn it into a gel-like substance.