Grow the Hive

{1}, Sacrifice a creature: Search your library for a land card with a basic land type, put it onto the battlefield tapped, then shuffle.

"They grab the colonists, they move them over there
and they immobilize them to be hosts for more of these. Which would mean that there would have to
be a lot of these parasites, right? One for each colonist. That's over a hundred at least."
—Ellen Ripley