Thread:RCM9698/@comment-5916303-20170110032816/@comment-5916303-20170110173550

I say we add it to the article.

There isn't a direct conformation, but rather visual interpretation of what happens (if there is one, I might have missed it). It's a direct poison and given that the victim's body seems to only react when it reaches their heart, we can safely assume that it somehow causes heart's muscles to contract and stop regular body function. Though, it might be just a curse, I'll check again for the exact details.

And yes, its effectiveness is tailored to the plot, but we can make an excuse and say that Esdeath has a lower body temperature, which in return slowed down its effectiveness.