User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-50.11.220.20-20130529230850/@comment-76.124.70.172-20130531103039

It might have only been a small amount of Centaur blood. I mean if you remember, it did make one of the Hunters very sick. It could have been because the shirt came from Aphrodite and she blessed it so it wouldn't kill someone.