Is this still a trick quetion and the answer is Black Lotus?
x Name:
x DOES contain b
x does NOT contain e x Mana Cost:
x does NOT contain 0
x does NOT contain 1
x does NOT contain 2
x does NOT contain 3
x does NOT contain 4
x does NOT contain 5
x does NOT contain 6
x does NOT contain 7
x does NOT contain 8
x does NOT contain 9