Genesis Device
Legendary Artifact, {2}{G}
Oracle Text
When Genesis Device enters, search your library for a basic land card or Planet card, put it onto the battlefield tapped, then shuffle.
{3}{G}{G}, {T}, Sacrifice Genesis Device: Sacrifice any number of lands you control, then search your library for up to that many land cards, put them onto the battlefield tapped, then shuffle. Activate only as a sorcery.