As far as I know there's nothing specifically crazy that happens with it, it's just a really good fog: one-sided, plus it generates what can be quite a large board for fairly cheap, regardless of the rest of your board state. So your opponent can attack into what they think is a totally open board and get wrecked. And compared to [[Settle the Wreckage]] which also kinda does that, Settle doesn't improve your board state.
That said, it would not be its current price without scarcity either. It only had one print in a precon a while ago.
Also called EDH or Elder Dragon Highlander, Commander is Magic's most popular format and all about picking your hero and building a deck around them. In this casual, multiplayer format, you choose a legendary creature to serve as your commander and build the rest of your 100 card deck around their color identity and unique abilities. Players are only allowed one of each card in their deck, with the exception of basic lands, but they can use cards from throughout Magic's history.
Commander combines the command zone, color identity, singleton deckbuilding, multiplayer strategies, and the entire MtG cardpool for one of the most exciting and fresh ways to play.
Read more at Commander's official website.
