Board Thread:Manga/@comment-7278867-20170312084406/@comment-30069705-20170403091641

SH Cow wrote: I think it depends on how often a shiter uses their powers. It's quite likely that Ymir Fritz used her powers very often, as she built cities for her subjects. Using her titan powers that often probably exhausted her body very quickly, and after thirteen years, her body couldn't handle the power of the Titans any longer, and so she died. Grisha, on the other hand, rarely used his Titan shifter power. The only time we ever see him shift was the day Wall Maria fell, when he went out to retrieve the Coordinate from the Reiss Family.

Also, what if the tree that Eren is lying under at the beginning of the series the same tree that appears in drawings depicting Ymir Fritz? (The tree where Ymir picks the apple from) As far as we know, the 13 year rule is a constant, regardless of how much the power is used. Uri Reiss, by default, was almost at the end of his 13 year time limit when he already looked like he was falling apart, and I don't see reason for him to have used his titan powers much either.