You may play an additional land on each of your turns.
To solve — You control seven or more lands.(If unsolved, solve at the beginning of your end step.)
Solved — You may look at the top card of your library any time, and you may play lands and cast creature and enchantment spells from the top of your library.
![Case of the Locked Hothouse [MKM-155]](http://solstyx.com/cdn/shop/files/mkm-155-case-of-the-locked-hothouse.png?v=1742146303&width=1445)
![Case of the Locked Hothouse [MKM-155]](http://solstyx.com/cdn/shop/files/MagicBackRedoNoBG_6f8a99ba-b189-4434-ae3c-5e375291578d.png?v=1745454873&width=1445)