Xorn + Black Market Tycoon + Umbral Mantle + Goldspan Dragon

Xorn
Black Market Tycoon
Umbral Mantle
Goldspan Dragon

Requires
Xorn must be on the battlefield. Black Market Tycoon must be on the battlefield. Umbral Mantle must be on the battlefield. Goldspan Dragon must be on the battlefield. Umbral Mantle attached to Black Market Tycoon. Black Market Tycoon does not have summoning sickness.
Steps
  1. Activate Black Market Tycoon by tapping it, creating two Treasure tokens.
  2. Activate both Treasure tokens by tapping and sacrificing them, adding 4.
  3. Activate Black Market Tycoon by paying 3 and untapping it, giving itself +2/+2 until end of turn.
  4. Repeat.
Results
Infinite colored mana. Infinitely large Black Market Tycoon until end of turn. Infinite Treasure tokens.

Top Commanders (2)
Jolene, the Plunder Queen
0.48% of 3104 decks 15 decks
Rocco, Cabaretti Caterer
0.05% of 5846 decks 3 decks
High Synergy Cards (10)
Sticky Fingers
78% of 18 decks +76% synergy
Professional Face-Breaker
79% of 19 decks +74% synergy
Brass's Bounty
68% of 19 decks +67% synergy
Ancient Copper Dragon
67% of 12 decks +64% synergy
Tireless Provisioner
68% of 19 decks +64% synergy
Ingenious Artillerist
64% of 11 decks +62% synergy
Magda, Brazen Outlaw
63% of 19 decks +62% synergy
Hellkite Tyrant
63% of 19 decks +61% synergy
Big Score
61% of 18 decks +57% synergy
Reckless Fireweaver
58% of 19 decks +56% synergy
Top Cards (10)
Academy Manufactor
74% of 19 decks +70% synergy
Bootleggers' Stash
72% of 18 decks +71% synergy
Beamtown Beatstick
67% of 6 decks +66% synergy
The Reaver Cleaver
67% of 9 decks +65% synergy
Old Gnawbone
58% of 19 decks +55% synergy
Goblin Anarchomancer
58% of 19 decks +55% synergy
Unexpected Windfall
58% of 19 decks +55% synergy
Dockside Extortionist
58% of 19 decks +50% synergy
Glittermonger
56% of 18 decks +55% synergy
Prizefight
56% of 18 decks +55% synergy
Creatures (30)
Captain Lannery Storm
53% of 19 decks +51% synergy
Birds of Paradise
47% of 19 decks +35% synergy
Gala Greeters
44% of 18 decks +43% synergy
Storm-Kiln Artist
42% of 19 decks +37% synergy
Fathom Fleet Swordjack
37% of 19 decks +37% synergy
Wulfgar of Icewind Dale
37% of 19 decks +36% synergy
Prosperous Innkeeper
37% of 19 decks +36% synergy
Marut
36% of 11 decks +36% synergy
Swashbuckler Extraordinaire
36% of 11 decks +36% synergy
Rose Room Treasurer
33% of 18 decks +33% synergy
Fangren Marauder
32% of 19 decks +31% synergy
Hoarding Ogre
32% of 19 decks +31% synergy
Impulsive Pilferer
32% of 19 decks +30% synergy
Ragavan, Nimble Pilferer
32% of 19 decks +28% synergy
Eternal Witness
32% of 19 decks +21% synergy
Hellkite Charger
26% of 19 decks +25% synergy
Atsushi, the Blazing Sky
26% of 19 decks +25% synergy
Temur Sabertooth
26% of 19 decks +24% synergy
Llanowar Elves
26% of 19 decks +16% synergy
Gadrak, the Crown-Scourge
21% of 19 decks +20% synergy
Jaxis, the Troublemaker
21% of 19 decks +20% synergy
Kiki-Jiki, Mirror Breaker
21% of 19 decks +19% synergy
Anger
21% of 19 decks +18% synergy
Imperial Recruiter
21% of 19 decks +18% synergy
Toski, Bearer of Secrets
21% of 19 decks +18% synergy
Elvish Mystic
21% of 19 decks +12% synergy
Goblin Engineer
16% of 19 decks +14% synergy
Craterhoof Behemoth
16% of 19 decks +13% synergy
Etali, Primal Storm
16% of 19 decks +11% synergy
Fyndhorn Elves
16% of 19 decks +9% synergy
Instants (15)
Beast Within
53% of 19 decks +34% synergy
Heroic Intervention
47% of 19 decks +34% synergy
Second Harvest
42% of 19 decks +40% synergy
Chaos Warp
42% of 19 decks +26% synergy
Deflecting Swat
37% of 19 decks +29% synergy
Nature's Claim
32% of 19 decks +26% synergy
Krosan Grip
26% of 19 decks +22% synergy
Harrow
26% of 19 decks +21% synergy
Return of the Wildspeaker
26% of 19 decks +20% synergy
Tibalt's Trickery
21% of 19 decks +18% synergy
Worldly Tutor
21% of 19 decks +14% synergy
Rampage of the Clans
16% of 19 decks +15% synergy
Pyroblast
16% of 19 decks +13% synergy
Red Elemental Blast
16% of 19 decks +12% synergy
Return to Nature
16% of 19 decks +12% synergy
Sorceries (20)
Cultivate
53% of 19 decks +30% synergy
Seize the Spotlight
50% of 18 decks +49% synergy
Crack Open
47% of 19 decks +47% synergy
Strike It Rich
47% of 19 decks +46% synergy
Seize the Spoils
47% of 19 decks +46% synergy
Nature's Lore
42% of 19 decks +27% synergy
Blasphemous Act
42% of 19 decks +26% synergy
Vandalblast
37% of 19 decks +29% synergy
Kodama's Reach
37% of 19 decks +21% synergy
Rampant Growth
37% of 19 decks +20% synergy
Reckless Endeavor
32% of 19 decks +31% synergy
Pirate's Pillage
26% of 19 decks +25% synergy
Three Visits
26% of 19 decks +15% synergy
Farseek
26% of 19 decks +11% synergy
Rishkar's Expertise
21% of 19 decks +16% synergy
Jeska's Will
21% of 19 decks +12% synergy
Visions of Ruin
16% of 19 decks +15% synergy
Decimate
16% of 19 decks +14% synergy
Finale of Devastation
16% of 19 decks +12% synergy
Gamble
16% of 19 decks +11% synergy
Utility Artifacts (18)
Diamond Pick-Axe
75% of 4 decks +73% synergy
Goldvein Pick
53% of 19 decks +52% synergy
Treasure Map
47% of 19 decks +46% synergy
Lightning Greaves
42% of 19 decks +17% synergy
Hoard Hauler
39% of 18 decks +39% synergy
Krark-Clan Ironworks
37% of 19 decks +36% synergy
Treasure Chest
26% of 19 decks +26% synergy
Tempting Contract
26% of 19 decks +26% synergy
Clock of Omens
26% of 19 decks +25% synergy
Altar of Dementia
26% of 19 decks +23% synergy
Prying Blade
21% of 19 decks +21% synergy
Nettlecyst
21% of 19 decks +19% synergy
Swiftfoot Boots
21% of 19 decks -7% synergy
Gilded Pinions
17% of 18 decks +16% synergy
Boxing Ring
17% of 18 decks +16% synergy
Dragonspark Reactor
16% of 19 decks +15% synergy
Idol of Oblivion
16% of 19 decks +12% synergy
Ashnod's Altar
16% of 19 decks +8% synergy
Enchantments (14)
Stimulus Package
44% of 18 decks +44% synergy
Rain of Riches
44% of 18 decks +44% synergy
Parallel Lives
42% of 19 decks +39% synergy
Viridian Revel
37% of 19 decks +36% synergy
Doubling Season
37% of 19 decks +33% synergy
Rhythm of the Wild
37% of 19 decks +32% synergy
Primal Vigor
32% of 19 decks +30% synergy
Shiny Impetus
26% of 19 decks +25% synergy
Sylvan Library
26% of 19 decks +20% synergy
Crown of Flames
21% of 19 decks +21% synergy
Aggravated Assault
21% of 19 decks +20% synergy
Bear Umbra
21% of 19 decks +19% synergy
Goblin Bombardment
21% of 19 decks +18% synergy
Most Wanted
17% of 18 decks +17% synergy
Utility Lands (9)
Treasure Vault
53% of 19 decks +50% synergy
Kessig Wolf Run
42% of 19 decks +39% synergy
Yavimaya, Cradle of Growth
32% of 19 decks +22% synergy
Boseiju, Who Endures
26% of 19 decks +17% synergy
Ancient Tomb
21% of 19 decks +10% synergy
Rogue's Passage
21% of 19 decks +3% synergy
Great Furnace
16% of 19 decks +13% synergy
Darksteel Citadel
16% of 19 decks +12% synergy
Urza's Saga
16% of 19 decks +9% synergy
Mana Artifacts (5)
Sol Ring
84% of 19 decks -0% synergy
Arcane Signet
68% of 19 decks -2% synergy
Gruul Signet
37% of 19 decks +34% synergy
Chrome Mox
16% of 19 decks +9% synergy
Fellwar Stone
16% of 19 decks -5% synergy
Lands (23)
Command Tower
84% of 19 decks +11% synergy
Cinder Glade
74% of 19 decks +65% synergy
Rockfall Vale
58% of 19 decks +53% synergy
Wooded Ridgeline
50% of 8 decks +49% synergy
Game Trail
47% of 19 decks +44% synergy
Rootbound Crag
47% of 19 decks +43% synergy
Spire Garden
47% of 19 decks +42% synergy
Stomping Ground
47% of 19 decks +38% synergy
Exotic Orchard
42% of 19 decks +8% synergy
Gruul Turf
37% of 19 decks +33% synergy
Wooded Foothills
37% of 19 decks +27% synergy
Cragcrown Pathway
32% of 19 decks +29% synergy
Fire-Lit Thicket
26% of 19 decks +25% synergy
Highland Forest
26% of 19 decks +25% synergy
Sheltered Thicket
26% of 19 decks +25% synergy
Taiga
26% of 19 decks +23% synergy
Karplusan Forest
26% of 19 decks +23% synergy
Fabled Passage
26% of 19 decks +17% synergy
Myriad Landscape
21% of 19 decks -0% synergy
Temple of Abandon
16% of 19 decks +13% synergy
Windswept Heath
16% of 19 decks +6% synergy
Verdant Catacombs
16% of 19 decks +4% synergy
Evolving Wilds
16% of 19 decks -6% synergy