Mono-black Rat tribal built around Splinter of the Shadows. Whenever it attacks or blocks, every other Rat gets +X/+X, where X is the number of Rats on board, so a wide board of Rat tokens and Rat Colony copies turns into a lethal swing. Its end-step mill four, returning up to two Rats to hand, gives a steady stream of creatures and keeps the deck going through removal. Token makers, cost reducers and graveyard mass-reanimation build the board, and mill-triggered drain cards punish every card that hits the graveyard. How it wins: It goes wide with Rats and attacks with the commander, so the scaling pump, plus poison from toxic and evasion from fear, ends the game in one or two combat steps, while drain effects chip in damage along the way. Key roles: - Rat swarm: Many bodies of one type, especially multiple copies of the same name and recurring token generators, make the commander's +X/+X huge and grow each other. (Rat Colony, Lord Skitter, Sewer King, Marrow-Gnawer) - Lethal-making anthems: Effects that stack with the commander's pump so a wide attack kills fast: poison from toxic, deathtouch, fear evasion, and a Background giving shared-type creatures +2/+0 and undying when the commander taps to attack. (Karumonix, the Rat King, Haunted One, Ogre Slumlord) - Mill-fueled recursion: The commander's end-step mill and other self-mill fill the graveyard, then cards that return all creatures of a name or type bring the swarm back to hand or straight to the battlefield. (Patriarch's Bidding, Echoing Return, Rat King, Verminister) - Graveyard drain: Creatures dying or being milled into graveyards ping opponents, turning the commander's mill, sacrifice outlets and combat trades into reach. (Syr Konrad, the Grim, Dreadhound, Bontu's Monument) - Copy multiplication: Ripple and same-name tutoring turn one Rat Colony cast into several free copies, exploding the Rat count in one turn. (Thrumming Stone, Demonic Tutor, Rat Colony) - One-sided sweep: Naming Rat wipes every non-Rat creature while the swarm survives, clearing blockers before a lethal attack. (Kindred Dominance, Darksteel Plate)

Splinter of the Shadows decklist

• Altar of the Brood
• Black Market Connections
• Bontu's Monument
• Castle Locthwain
• Codex Shredder
• Conqueror's Galleon
• Darksteel Plate
• Demonic Tutor
• Diabolic Tutor
• Dreadhound
• Echoing Return
• El Dorado Sarcophagus
• Ghost Quarter
• Haunted One
• Isolated Watchtower
• Jet Medallion
• Karumonix, the Rat King
• Kindred Dominance
• Lord Skitter, Sewer King
• Marrow-Gnawer
• Minas Morgul
• Myriad Landscape
• Necropotence
• Nykthos, Shrine to Nyx
• Ogre Slumlord
• Opal Palace
• Patriarch's Bidding
• Phyrexian Arena
• 40× Rat Colony
• Rat King, Verminister
• Reliquary Tower
• Shaft of Hands
• Sol Ring
• Splinter, Vengeful Sensei
• 22× Swamp
• Swarmyard
• Syr Konrad, the Grim
• Thrumming Stone
• War Room