Hardening: After consuming a "braun" serum, Eren gained the ability to crystallize his skin. This allowed him to create hardened fists for punching or massive structures to seal breaches in the Walls.

Eren’s Titan is not just a weapon of destruction—it is a , rage against oppression, and the tragic cost of fighting for a future.

: After consuming Lara Tybur, Eren gains the ability to create structures and weapons from hardened Titan flesh. He can also remotely pilot his Titan through a hardened cable. The Final Forms