Galen Urso, Jaded Researcher

Whenever one or more Rebels you control deal combat damage to a player, if at least one of those creatures was exerted, search your library for a basic land and put it onto the battlefield tapped. Shuffle your library.

Orson Krennic : "We were on the verge of greatness. We were this close to providing peace and security for the galaxy."
Galen Erso : "You're confusing peace with terror."