The joke is that Malfoy is a name synonymous with a popular Harry Potter character, and Harry Potter does magic. This card game is called magic. So clearly, this post by Jason is insinuating that this card reminds him of Hagrid, who regularly stood by Neville Longbottom any time Malfoy attempted to hurt Neville's feelings.
And no this post isn't a sad attempt to keep the thread alive. You know nothing.
Inb4 Waddell replies to that last statement with "Jon Snow".
I.. what?