Reanimation spells are the classic option, but you can set up lines for cards like Underworld Breach or Past in Flames by putting relevant pieces in the graveyard
Lets go down each card type and look at each corresponding subtype
Osgood, Operation Double Osgood, Operation Double gets a nod for making two creatures with relevant mana abilities for artifact decks and being able to investigate via the paradox ability word
from scipy.stats import hypergeom import numpy as np # Supress scientific notation np.set_printoptions(suppress=True) def calculate(M, n, N): [M, n, N] = [M, n, N] rv = hypergeom(M, n, N) x = np.arange(0, n+1) return rv.pmf(x) * 100 calculate(60, 4, 7) This script outputs [60.05, 33.63, 5.93, 0.38, 0.01 ] , which are the probabilities of drawing zero, one, two, three, or four BVP, respectively