It doesn't grant the land any intrinsic abilities
Otherwise, its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle. In essence, this is a ramp spell that can also be used to destroy problematic artifacts or enchantments, and thats a really interesting bit of design, and well worth picking up for your decks
Impulse gets you through your deck quickly, allows you to quickly search for an answer to an impending problem, and does it all so effectively that almost any blue deck capable of running Impulse in any given environment has done so without hesitation
The MTG Arena Mythic Invitational
It is one of the only ways to effectively be safe on turn one as a blue mage
The rare is game winner that drops for two, equips for three to legendary stuff like your Commander, and gives it size boosts equal to your land count