Fiery ConfluenceFiery Confluence (53,188 Inclusions, 2% of 2,337,008 Decks) Four mana, draw 18 seems good, doesn't it
Hour of Devastation : Deals 5 damage to each creature and each non-Bolas planeswalker
You can do that one turn earlier than normal ultimates and they all have nasty synergy together
Plus, we have more recursion coming in Core Set 2019 , with Bone Dragon, Liliana, Untouched by Death, Rise from the Grave, and Crucible of Worlds
The creature side of things is Questing Druid, a two-mana green 1/1 that reads: Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on Questing Druid. In the right deck, this card isnt just card draw but a terrifying threat, as it could grow absolutely massive fairly quickly