That led me to the idea of B.F.M., a creature so big, a 99/99, that he required two cards, consisting of a left side and a right side
The deck naturally has a lot of useful ramp cards and Landfall value, which has high usefulness outside of the deck
Shalai, Voice of Plenty Shalai, Voice of Plenty offers one of the best ways to protect your board
#5 clearly the answer is to break singleton ok sorry more seriously a difficulty is making sure the intersection of black's weaknesses (unable to deal with artifacts, enchantments, and perhaps certain green creatures), still leads to interesting games for both players when those issues come into play
Tezzeret is arguably the most powerful for how much it gives to an artifact-focused blue deck