Guys, to explain this in the simplest of turns, Fei made a Deal with Devil to overcome the trials posed by Emilia. This deal is now restricting her future options in life so long as it is not fulfilled.

It was an Opportunity Cost. Fei choose the easy way through one issue, and is now forced onto another path as a consequence. The matter is decided.

[quote=@The 42nd Gecko]
<Snipped quote by TheWindel>

Considering how deadly some people's bodies are, I would consider an icicle knife far less of a weapon than many people's hands. How does the special dealy know, if not by whether the action will deal damage? It's not intent, because that would have noticed the weapon was not going to hurt.

Is it based on appearances? What looks threatening?

[/quote]

It's a deal made by the Jester, a man who stands as the right hand of a Goddess that is the Imperator. It's best not to question the lengths of his magic and accept that it can perceive a threat when it does.