That said, you still definitely need to have a few of the payoff type cards to try playing this strategy I can tell you from experience that just playing a bunch of low-cost white and black cards wont have the oomph to finish off most opponents
Taborax, Hope's Demise This 2/2 flying three-drop has lifelink with enough counters on it, and then when your nontoken stuff dies you'll toss one here
Funeral Room // Awakening Hall Funeral Room gives you a Bastion of Remembrance/Zulaport Cutthroat effect, for 3 mana, and thats already interesting
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The second reason youd want ramp spells is to cast your big white commanders ahead of time, like Zetalpa, Primal Dawn or Elesh Norn