'Ice that never melts'

[Gammerick]

Most players probably just got the Fire Armor set for free, but for those of us curious enough to crack the riddle, what is the mystery item to be offered?

 

[Styx]

In ancient history some thought diamonds were a type of ice.

 

[TravissPastrami]

Yeah, like Sir Gooch said, it's the Glowing Ice Shard. In the item description when you pick it up it says that it will never melt.