Explorer's Spirit

When Explorer's Spirit enters the battlefield and at the beginning of your upkeep, if an opponent controls two or more lands than you, you may search your library for a land card, reveal it and put it into your hand, then shuffle.
"The indomitable Ontangan spirit manifests itself into action whenever feet meet the deck of a ship, or the shore of a new land."
— Milena Enesi, Renowned Seafarer