Desert

• WWizards of the Coast2004-10-04
  Official Ruling
  The ability can be used on any player's attacking creatures. This includes your own and creatures in an attack you are not involved in (for multiplayer games).
• WWizards of the Coast2017-04-18
  Official Ruling
  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.
• WWizards of the Coast2024-04-12
  Official Ruling
  The end of combat step happens after combat damage is dealt. You can't use Desert to destroy an attacking creature before it has a chance to deal combat damage.

Rulings via Scryfall