Donatello, the Brains turns every token-creation effect into additional Mutagen tokens, which fuel a self-reinforcing engine of artifact sacrifice, counter placement, and drain effects through cards like Marionette Apprentice, Reckless Fireweaver, and Weftstalker Ardent. The deck pairs this flood of artifact tokens with untapping effects and cost reducers to generate overwhelming resources while grinding opponents down with enter-the-battlefield and death triggers. The primary win conditions are infinite loops using Goblin Bombardment as the sacrifice outlet — either with Crime Novelist and Animation Module for infinite damage through counter generation, or with Pitiless Plunderer and Stridehangar Automaton to create infinite Treasure tokens and death triggers that drain opponents out.

Donatello, the Brains decklist

• Leonardo, the Balance
• April O'Neil, Human Element
• Basking Broodscale
• Crime Novelist
• Forensic Gadgeteer
• Hardened Tactician
• Jan Jansen, Chaos Crafter
• Kutzil, Malamet Exemplar
• Leonin Abunas
• Marionette Apprentice
• Pinnacle Emissary
• Pitiless Plunderer
• Ravenous Robots
• Reckless Fireweaver
• Rosie Cotton of South Lane
• Sai, Master Thopterist
• Stormclaw Rager
• Stridehangar Automaton
• Susurian Voidborn
• Walking Ballista
• Weftstalker Ardent
• Daretti, Ingenious Iconoclast
• Daretti, Scrap Savant
• An Offer You Can't Refuse
• Counterspell
• Dovin's Veto
• Dramatic Reversal
• Generous Gift
• Negate
• Swords to Plowshares
• Unwind
• Diabolic Tutor
• Dig Up
• Splinter's Technique
• Winds of Abandon
• Animation Module
• Arcane Signet
• Ashnod's Altar
• Basalt Monolith
• Chromatic Lantern
• Clock of Omens
• Trading Post
• Fellwar Stone
• Gruul Signet
• Inspirit, Flagship Vessel
• Isochron Scepter
• Krark-Clan Ironworks
• Liquimetal Torque
• Network Terminal
• Orzhov Signet
• Retrofitter Foundry
• Rings of Brighthearth
• Sol Ring
• Sonic Screwdriver
• Talisman of Hierarchy
• Talisman of Conviction
• Talisman of Curiosity
• Unwinding Clock
• Efficient Construction
• Food Fight
• Goblin Bombardment
• Makeshift Munitions
• Mirrodin Besieged
• Ninja Pizza
• Dreamroot Cascade
• Yavimaya Coast
• Deserted Beach
• 4× Forest
• 4× Island
• Karplusan Forest
• 4× Mountain
• 4× Plains
• Exotic Orchard
• Adarkar Wastes
• Rockfall Vale
• Shattered Sanctum
• Shipwreck Marsh
• Shivan Reef
• Stormcarved Coast
• Sulfurous Springs
• Sundown Pass
• 4× Swamp
• The World Tree
• Command Tower