Geological Appraiser (The Lost Caverns of Ixalan 407) - Pack Promo - Uncommon Magic: The Gathering Card

When this creature enters, if you cast it, discover 3. (Exile cards from the top of your library until you exile a nonland card with mana value 3 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)