Quote ="Darkheart"Yeah, you're right pal. A poisoned chalice is a really positive thing. If I'm stuck in future I will drop you a PM.'"
A poisoned chalice, sir, is something which initially seems positive and beneficial, but eventually turns out to be the quite the opposite.
Eg. Chinese pottery was initially seen as a wonderful invention and was centuries ahead of other civilizations' attempts. However, this meant that they were delayed in other, arguably more important, inventions; such as glass.
That is a textbook case as a poisoned chalice. I will ask again; what is the initial perceived positive of getting an injury?
Also, if you are going to be a pompous twot, learn some basic English. For God's sake, it isn't a vague idiom and you really should know better.