To play a land means to put it onto the battlefield as a special action, and almost always from your hand (though a few effects allow this to happen from different zones, such as from the graveyard with Crucible of Worlds or from the library with Oracle of Mul-Daya). These effects use the word “play” specifically to indicate that it counts as playing a land.
Other effects can put a land card from some other zone “onto the battlefield.” These effects don’t count as “playing” a land, and don’t interfere with your normal land drop for the turn. So the same way Farseek or Terramorphic Expanse don’t stop you from playing a land normally, Into the Wilds simply puts a land onto the battlefield from your library, and you are still able to play a land from your hand that turn if you have one to play.
Also, don’t forget to draw for your turn after resolving Into the Wilds’ trigger. If that card was a land, it moves from the library to the battlefield during your upkeep, and you still go to your draw step right afterwards!
Today’s Rules tip written by Josh Stansfield