User blog comment:Gourgeist/Shingeki no Kyojin Chapter 63 Review: Chains/@comment-177.224.167.88-20141118064736/@comment-5433366-20141205072356

The serum that Grisha gave Eren turned him into a regular Titan. Eren ate him and Grisha's Titan powers transferred to Eren, along with Frieda's memories and the Coordinate ability.