Later, after the disastrous mission to plug the gate, Eren was captured by the Female Titan (Annie) and handed over to the Garrison Regiment. He was beaten, exhausted, and chained in a dungeon beneath the walls.
In the dungeon, he failed because he was starving; the "engine" had no fuel.
In the supply depot, he failed because his mind was paralyzed by fear and confusion; the "switch" was stuck because his will wasn't focused. why couldn't eren transform in season 1
So, why couldn't he transform?
That day, Eren lacked the conviction of a monster. He was still just a boy trying to be a hero. Later, after the disastrous mission to plug the
The shifter must sustain a physical wound that draws blood. This acts as the physical catalyst. Usually, Eren achieves this by biting his hand or thumb, though external injuries—like a blade wound or a gunshot—can also suffice. 2. A Clear, Fixed Goal
After the battle in Trost, Eren was running on fumes. He had transformed multiple times in quick succession (the first accidental transformation, the partial one during his coma dream, and the final one to plug the gate). His body had sustained massive damage. In the supply depot, he failed because his
During the "Hardening Experiment" attempts later in the series (and in his desperate fight in Trost), Eren learned the truth through painful trial and error.