Rivals of Ixalan

Flood of Recollection | Sorcery | | Return target instant or sorcery card from your graveyard to your hand. Exile Flood of Recollection. | Magali Villeneuve

Arterial Flow | Sorcery | | Each opponent discards two cards. If you control a Vampire, each opponent loses 2 life and you gain 2 life. | Josh Hass

Golden Demise | Sorcery | | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) All creatures get -2/-2 until end of turn. If you have the city's blessing, instead only creatures your opponents control get -2/-2 until end of turn. | Deruchenko Alexander

Pirate's Pillage | Sorcery | | As an additional cost to cast this spell, discard a card. Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.") | Wayne Reynolds

Enter the Unknown | Sorcery | | Target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the creature, then put the card back or put it into your graveyard.) You may play an additional land this turn. | Howard Lyon

Strength of the Pack | Sorcery | | Put two +1/+1 counters on each creature you control. | Tomasz Jedruszek

Thunderherd Migration | Sorcery | | As an additional cost to cast this spell, reveal a Dinosaur card from your hand or pay {1}. Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. | Lars Grant-West