Board Thread:Manga/@comment-5774380-20160408232143/@comment-27321453-20160427032113

Well there's a theory that suggests the serum Levi has would turn whoever gets injected with it into a Shifter instantly without the need of devouring another Shifter while being a dumb dumb Titan. Since you know, the Shifting ability is concentrated in the Shifter's spinal fluid and the Titan serum seem to also be made of human spinal fluid so it's not that far fetched that there'd be such serum that makes an instant Shifter because, after all, how was the first Shifter came to be? Who did he/she devour to become a Shifter? Hence the theory of instant Titan Shifter serum.