User blog comment:Rizake/Ymir's curse lifted?/@comment-7278867-20170520133416

it may be so, but what i think is there is and was nothing such as Ymir's curse anyway.

The royal family's brains were primitive anyways...

'''its just the weakness caused by the constant usage of power... nothing happened to Grisha when he reached the 13 year mark, he just panicked and thought that Eren was far better possessor of the power, after Eren told Grisha about his thirst for freedom (I think Grisha saw Kruger in Eren).'''

'''In a world of realism, Curses have no place. There is no Devil, no magic, just pure realism. Titans are real, Physics and Chemistry are real, and war is real.'''

In the world that Hajime has brought forward, 13-year curses seem bonkers thats all!!