The Lost Caverns of Ixalan

Calamitous Cave-In | Sorcery | | Calamitous Cave-In deals X damage to each creature and each planeswalker, where X is the number of Caves you control plus the number of Cave cards in your graveyard. | Diego Gisbert

Curator of Sun's Creation | Creature | Human Artificer | Whenever you discover, discover again for the same value. This ability triggers only once each turn. | Javier Charro

Geological Appraiser | Creature | Human Artificer | When Geological Appraiser enters the battlefield, 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.) | Alix Branwyn

Caparocti Sunborn | Legendary Creature | Human Soldier | Whenever Caparocti Sunborn attacks, you may tap two untapped artifacts and/or creatures you control. If you do, 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.) | Donato Giancola