If Hostile Desert becomes a creature the same turn it enters the battlefield, you can't attack with it or tap it for mana.
18-04-2017
wotc
Desert is a land subtype with no special meaning. It doesn't grant the land an intrinsic mana ability. Other cards may care about which lands are Deserts.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.