Leading the pack is the legendary creature Slinza, the Spiked Stampede
Fact or Fiction can net you more card advantage, but is also instant-speed while giving you card-selection from the cards in the top five
While it's pretty god in Mono-Red decks, it won't be even considered for any other archetype
Proliferating it will also let you use it as protection for something like Atraxa, Praetors Voice Preston, the Vanisher FromTheShire: Let the Felidar Guardian shenanigans commence
Yes, Born of the Gods features several minor deities that expand on the themes established in the first Theros set.
Use the Lotus to tap for triple black, then untap it for one mana with the Staffs first ability, draw your entire deck (thanks to Staff of Domination), cast an infinitely large Exsanguinate or Torment of Hailfire and youre done