Quote from TheOnlyOne652089 »Does not allow you to play cards from the hand, which is not so nice.
But otherwise, if you ever get to use it, the worst part is to get stuck on lands (you can at least play 1, but the 2nd is bad).
For a 6-drop thats pretty bad.
You're looking at this all wrong. If there's a land on top of their deck you choose not to play anything so they draw a land for their turn. Xanathar is a one card Lantern lock.