Rona, Herald of Invasion // Rona, Tolarian Obliterator [March of the Machine Prerelease Promos]

Trample Whenever a source deals damage to Rona, Tolarian Obliterator, that source's controller exiles a card from their hand at random. If it's a land card, you may put it onto the battlefield under your control. Otherwise, you may cast it without paying its mana cost.