When trying to select a Thaumaturge’s first implement, the only one listed is Shield from Battlecry!.
Thanks for the report, we’ll look into what’s going on here.
I looked into this a little bit further and it appears that the issue is coming from the Thaumaturge being listed as a Legacy class. We’re working on some things on our end that might change the way it appears but for now if you go to Getting Started, click on Preferences, and then set Show Legacy Content to on the other implements should appear.