I get that drawing the extra cards from spells like Brainstorm can easily be preferred, but do not underestimate the advantage looking at your top 5 can give you
Apple of Eden, Isu Relic Our highest scoring permanent, artifact, historic card and legendary is this four-drop that taps for no mana, just a loss of four life at sorcery speed and this self-sacs
Mayael the Anima likewise can start getting huge fatties off the top of your library straight into your opponents noggin
Dont forget Crucible of Worlds to access lands from your graveyard when needed
Whenever you draw a card, Zombies get +1/+1 until the end of the turn
Both Cultivate and Kodama's Reach search your deck for two basic lands, putting one into play tapped and putting the other into your hand