Then reveal cards from the top of your library until you reveal X land cards, where X is the number of legendary creatures you control
For regular upgrades I highly recommend: Vito, Thorn of the Dusk Rose, Mondrak, Glory Dominus, Anointed Procession, Parallel Lives, Eerie Ultimatum, and you can also run the Cat Oven combo with Cauldron Familiar + Witch's Oven + Clock of Omens, and there's the Ballista Combo Heliod, Sun-Crowned + Walking Ballista, and finally the Exquisite Blood Combo since the deck already runs the other piece Sanguine Bond One Down, Three to Go
I could see a version using discard on turn one both as disruption and to see what they need to answer and then Discovery to actually find the answers or finding and setting up a fast Tasigur or Gurmag Angler
A free creature token whenever you make tokens, on a decent body that can grow makes Quina decently