Rivals of Ixalan

Crashing Tide | Sorcery | | This spell has flash as long as you control a Merfolk. Return target creature to its owner's hand. Draw a card. | Carmen Sinek

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

Secrets of the Golden City | Sorcery | | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Draw two cards. If you have the city's blessing, draw three cards instead. | Jason Felix