Null Profusion

Null Profusion sees almost no play in Legacy or Vintage despite being legal in both — the effect is powerful in theory, but combo decks in those formats have faster, less restrictive draw engines, and the six-mana ask is prohibitive. Modern is the same story: six mana for a conditional draw engine doesn't compete. Commander is where Null Profusion actually lives, specifically in commanders who ignore or weaponize the hand-size cap — discard synergy builds, Reliquary Tower-light shells that want to be hellbent, or commanders like Damia who refill past the restriction anyway. Outside those specific shells, it's a trap: the symmetry punishes you as much as anyone, and six mana is a steep price for a card that can strand you on two cards in hand if your game plan doesn't account for it.