You also need one Lumra, Bellow of the Woods on the battlefield and another in the graveyard
The beauty of the TCGO is that it caters to all experience levels every step of the way, so even if you skip the tutorials, the single player has a help system that reminds you of your current play options and suggests optimal moves (of course, you can also turn all of help functions off if you don't need them)
Then it becomes an 8/10, etc
With much more than just one-shot tap abilities, the deck can build combo-like engines with Opposition, Junk Winder, or Court Street Denizen that will tap every enemy creature in play and leave you with a massive army, each and every turn
So I decided to get in contact with one of the stores I visited during my recent trip to find out just how deep these issues run