Beseech the Mirror Bile-Vial Boggart Billowing Shriekmass Binding Negotiation Bitter Triumph Bitterbloom Bearer Black Cat, Cunning Thief Black Mage's Rod Black Widow, Super Spy Blacksnag Buzzard Blade of the Swarm Blasphemous Edict Blight Rot Blighted Blackthorn Blood Hustler Bloodghast Bloodletter of Aclazotz Bloodline Bidding
The weakness of the late game and reactive effects in these colors force the mono-Mardu player to remove permanents proactively, declare pre-emptive early game attacks, play hate cards that restrict opponents options, and generally make enemies at the table
But then, for those players that have been around for a while like myself, you remember the vorracs present on the very first visit to Mirrodin, dont you
The 4ED text reads, gain life when a black spell is successfully cast, while the 6ED text says: Whenever a player plays a black spell, you may gain one life. Here's another case with Aether Storm and Future Sight
Whenever another creature enters the battlefield under your control, check its power and toughness against the power and toughness of Evolving Adaptive