Overall) I adore this on curve, Gruul, 4/4 4-drop that lets you drop another land on each of your turns for another go around the Landfall trigger
This makes it a political tool perfect for multiplayer
Apprentice Wizard Apprentice Wizard reminds me a lot of Worn Powerstone
Crucible of Worlds plus an additional land drop plus a way to mill yourself puts so many necessary effects into a single card that its hard to beat
Her first spoiler is the English version of the Buy a Box Promotional Thalia, Heretic Cathar that was leaked last week
The exact combo lines can be modular, but the core idea stays the same: get Lumra onto the battlefield, kill Lumra and/or sacrifice your Lands with the ETB on the stack, bring everything back, generate more resources than you spent, and repeat