Thanks for finding this. I knew there was an early Dragon Magazine with an article like this!
We all know the real secret is he is 5e multi class bard, magic user who likes to cast the Light and Phantasmal Force at higher levels because it is ironic, and uses the fireworks and pipe as his...
I like how they have not even released it yet and people are already whining about the magic system and how Gandalf is stated up. Good thing they gave me fair warning. I have to save up for this purchase.