Eren Colossal Titan Episode ((new)) -

But the physical transformation occurs moments later. Unlike Bertholdt, whose transformation was a slow, building disaster, Eren’s Colossal Titan emerges as a weapon of specific, terrifying intent.

However, in Episode 7 of Season 4, titled "Assault," the anime landscape shifted forever. The episode delivered one of the most shocking transformations in the medium's history: Eren Yeager, the protagonist turned antagonist, inherited the Colossal Titan.