When Oreskos Explorer enters the battlefield, search your library for up to X Plains cards, where X is the number of players who control more lands than you. Reveal those cards, put them into your hand, then shuffle your library.
Near Mint - $0.20
Near Mint Non-English - $0.20
Lightly Played Non-English - $0.20
Lightly Played - $0.20
Played - $0.20
Played Non-English - $0.20
Heavily Played - $0.10
Heavily Played Non-English - $0.10
Damaged - $0.10
Damaged Non-English - $0.10