I don't think it's possible to loot from the Reflection... We don't have a confirmation from Cipsoft saying that it's impossible but there is also no confirmation that it is.
This quest was made by hundreds of player, with several posts on forum and no one ever posted any proof of looting it (at least in the threads ive followed, which were many).
Regarding the fansite you mentioned, they may have copied the Raging Mage page and just changed the name (and forgot to remove Elemental Spikes from loot), I think that is more likely than the loot being true.