Mono-black Rat tribal that floods the board with Rats and turns that swarm into evasive damage. Marrow-Gnawer gives every Rat fear, so they can only be blocked by black or artifact creatures. Its tap ability sacrifices one Rat to create tokens equal to the Rats controlled, which multiplies a wide board. Around that engine sit discard-on-entry Rats, death triggers that refill or punish when Rats are sacrificed, and Rat lords whose power scales with the Rat count. How it wins: Marrow-Gnawer and other token makers grow a huge Rat army that attacks through fear, menace and deathtouch, boosted by scaling Rats, roles and anthems, with some poison and life-drain reach on the side. Key roles: - Rat multiplication: Rat and token producers build the critical mass that Marrow-Gnawer's sacrifice ability turns into exponentially more tokens. Some sacrifice outlets replace themselves with more Rats. (Marrow-Gnawer, Piper of the Swarm, Rat King, Pale Piper) - Scaling payoffs and anthems: these creatures grow with the Rat count or buff the whole tribe, turning a pile of 1/1s into lethal evasive attackers. (Pack Rat, Twisted Sewer-Witch, Ogre Slumlord) - Discard attrition: many Rats strip opponents' hands when they enter or die, and sorceries pile on more. This keeps opponents short on answers while the swarm grows. (Burglar Rat, Earsplitting Rats, Psychic Whorl) - Sacrifice fodder and death value: Rats that leave behind tokens, Treasure, card draw or proliferate when they die make every Marrow-Gnawer activation or chump attack profitable. (Tangled Colony, Innocuous Rat, Rabid Attack) - Graveyard recursion: a stocked graveyard of Rat cards gets returned en masse or converted into tokens, rebuilding after sweepers. This includes the deck's own Game Over and Crypt Rats board wipes. (Bloodline Bidding, Revenge of the Rats, Rat King, Verminister) - Alternate damage axes: toxic on every Rat, life drain, and a Crypt Rats sweep give extra ways to finish when combat alone falls short. (Karumonix, the Rat King, Crypt Rats, Engine Rat)

Marrow-Gnawer decklist

• Charcoal Diamond
• Crawlspace
• Firdoch Core
• Gathering Stone
• Pristine Talisman
• Tamiyo's Journal
• Arch of Orazca
• Lotus Field
• Mudflat Village
• 34× Swamp
• Adaptive Automaton
• Blightbelly Rat
• Burglar Rat
• Chittering Rats
• Chittering Witch
• Crypt Rats
• Daggerfang Duo
• Dirty Wererat
• Drainpipe Vermin
• Earsplitting Rats
• Emeritus of Woe // Demonic Tutor
• Engine Rat
• Gnawing Vermin
• Gutter Skulk
• Ink-Eyes, Servant of Oni
• Innocuous Rat
• Karumonix, the Rat King
• Lord Skitter's Butcher
• Nezumi Bladeblesser
• Nezumi Informant
• Ogre Slumlord
• Ossuary Rats
• Pack Rat
• Persistent Marshstalker
• Pestilence Rats
• Piper of the Swarm
• Rat King, Pale Piper
• Rat King, Verminister
• Ravenous Rats
• Refurbished Familiar
• Rotting Rats
• Ruin Rat
• Swarm of Rats
• Tangled Colony
• Thornplate Intimidator
• Tunnel Rats
• Twisted Sewer-Witch
• Typhoid Rats
• Undercity Dire Rat
• Tribute to Horobi // Echo of Death's Wail
• Bilbo's Deadly Slice
• Masterful Flourish
• Pain 101
• Rabid Attack
• Rat Out
• Reverent Howl
• Unbury
• Aberrant Return
• Bloodline Bidding
• Cost of Brilliance
• Decorum Dissertation
• Game Over
• Psychic Whorl
• Pull from the Grave
• Revenge of the Rats
• Shredder's Revenge