Board Thread:Questions and Answers/@comment-36478503-20180805204858/@comment-29390967-20190501220647

Late af but anyway. Because Titan Shifters can't transform while some wound is currently recovering like in Eren's case. They'll only be able to transform once every injury has been healed. In Reiner's case, he was able to transform because he had just been attacked and the regeneration wasn't automatically activated yet