Sai, Master Thopterist + Myr Retriever + Workshop Assistant + Phyrexian Altar + Enthusiastic Mechanaut

Sai, Master Thopterist
Myr Retriever
Workshop Assistant
Phyrexian Altar
Enthusiastic Mechanaut

Requires
Sai, Master Thopterist must be on the battlefield. Myr Retriever must be in the graveyard. Workshop Assistant must be on the battlefield. Phyrexian Altar must be on the battlefield. Enthusiastic Mechanaut must be on the battlefield.
Steps
  1. Activate Phyrexian Altar by sacrificing Workshop Assistant, adding 1.
  2. Workshop Assistant dies, returning Myr Retriever from your graveyard to your hand.
  3. Cast Myr Retriever by paying 1.
  4. Sai triggers, creating a 1/1 Thopter artifact creature token.
  5. Activate Phyrexian Altar twice by sacrificing the Thopter and Myr Retriever, adding 2.
  6. Myr Retriever dies, returning Workshop Assistant from your graveyard to your hand.
  7. Cast Workshop Assistant by paying 2.
  8. Sai triggers, creating a 1/1 Thopter artifact creature token.
  9. Repeat.
  10. Once you have infinite colored mana and creature tokens, you may use them to activate Sai's ability to draw infinite cards.
Results
Infinite card draw. Infinite colored mana. Infinite creature tokens. Infinite death triggers. Infinite draw triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite storm count.

Breya, Etherium Shaper
0.02% of 13853 decks 3 decks
Ashnod the Uncaring
0.10% of 2943 decks 3 decks
Animar, Soul of Elements
0.01% of 15877 decks 1 decks
Kraum, Ludevic's Opus // Slurrk, All-Ingesting
8.33% of 12 decks 1 decks
Elmar, Ulvenwald Informant // Hargilde, Kindly Runechanter
0.18% of 564 decks 1 decks
Saheeli, the Gifted
0.05% of 2017 decks 1 decks
Tetzin, Gnome Champion
0.03% of 3244 decks 1 decks
Jhoira, Weatherlight Captain
0.02% of 6170 decks 1 decks
Marchesa, the Black Rose
0.01% of 9321 decks 1 decks
Dargo, the Shipwrecker // Silas Renn, Seeker Adept
0.26% of 386 decks 1 decks
Zinnia, Valley's Voice
0.02% of 6100 decks 1 decks
Gut, True Soul Zealot // Clan Crafter
7.69% of 13 decks 1 decks
High Synergy Cards
Scrap Trawler
88% of 16 decks +85% synergy
Time Sieve
88% of 8 decks +85% synergy
Foundry Inspector
88% of 16 decks +83% synergy
Etherium Sculptor
81% of 16 decks +76% synergy
Ashnod's Altar
81% of 16 decks +74% synergy
Vault of Whispers
75% of 8 decks +71% synergy
Krark-Clan Ironworks
69% of 16 decks +68% synergy
Emry, Lurker of the Loch
69% of 16 decks +65% synergy
Junk Diver
62% of 16 decks +62% synergy
Great Furnace
62% of 16 decks +57% synergy
Top Cards
Jhoira's Familiar
50% of 16 decks +48% synergy
Mirrodin Besieged
50% of 16 decks +48% synergy
Goblin Engineer
50% of 16 decks +46% synergy
Bolas's Citadel
50% of 8 decks +41% synergy
Altar of Dementia
44% of 16 decks +41% synergy
Urza, Lord High Artificer
44% of 16 decks +41% synergy
Sensei's Divining Top
44% of 16 decks +38% synergy
Blasphemous Act
44% of 16 decks +10% synergy
Steel Overseer
38% of 16 decks +36% synergy
Myr Battlesphere
38% of 16 decks +35% synergy
Creatures
Imotekh the Stormlord
50% of 6 decks +49% synergy
Teshar, Ancestor's Apostle
50% of 6 decks +48% synergy
Esper Sentinel
50% of 6 decks +29% synergy
Goblin Welder
38% of 16 decks +35% synergy
Marionette Master
38% of 8 decks +34% synergy
Jhoira, Weatherlight Captain
38% of 16 decks +31% synergy
Baleful Strix
38% of 8 decks +24% synergy
Solemn Simulacrum
38% of 16 decks +23% synergy
Arcbound Ravager
31% of 16 decks +31% synergy
Shimmer Myr
31% of 16 decks +30% synergy
Thought Monitor
31% of 16 decks +28% synergy
Reckless Fireweaver
31% of 16 decks +27% synergy
Liberator, Urza's Battlethopter
29% of 14 decks +27% synergy
The Reality Chip
25% of 16 decks +21% synergy
Canoptek Spyder
21% of 14 decks +21% synergy
Ingenious Artillerist
20% of 15 decks +18% synergy
Arcbound Crusher
19% of 16 decks +18% synergy
Thopter Assembly
19% of 16 decks +18% synergy
Audacious Reshapers
19% of 16 decks +18% synergy
Trophy Mage
19% of 16 decks +17% synergy
Burnished Hart
19% of 16 decks +14% synergy
Imperial Recruiter
19% of 16 decks +13% synergy
Dockside Extortionist
19% of 16 decks +6% synergy
Instants
Counterspell
31% of 16 decks -12% synergy
Mana Drain
25% of 16 decks +10% synergy
Thirst for Knowledge
19% of 16 decks +17% synergy
Whir of Invention
19% of 16 decks +16% synergy
Pongify
19% of 16 decks +7% synergy
Negate
19% of 16 decks -4% synergy
Cyclonic Rift
19% of 16 decks -9% synergy
Chaos Warp
19% of 16 decks -13% synergy
Sorceries
Vandalblast
38% of 16 decks +21% synergy
Toxic Deluge
38% of 8 decks +20% synergy
Thoughtcast
31% of 16 decks +28% synergy
Fabricate
19% of 16 decks +13% synergy
Utility Artifacts
Executioner's Capsule
38% of 8 decks +37% synergy
Mystic Forge
38% of 16 decks +35% synergy
Skullclamp
38% of 16 decks +25% synergy
Lightning Greaves
38% of 16 decks +12% synergy
Nim Deathmantle
31% of 16 decks +31% synergy
Mishra's Bauble
31% of 16 decks +30% synergy
Trading Post
25% of 16 decks +24% synergy
Aether Spellbomb
25% of 16 decks +24% synergy
Moonsilver Key
25% of 16 decks +24% synergy
Ichor Wellspring
25% of 16 decks +23% synergy
Unwinding Clock
25% of 16 decks +22% synergy
Aetherflux Reservoir
25% of 16 decks +21% synergy
Wayfarer's Bauble
25% of 16 decks +15% synergy
Blasting Station
19% of 16 decks +18% synergy
Mycosynth Lattice
19% of 16 decks +18% synergy
Spine of Ish Sah
19% of 16 decks +18% synergy
Bident of Thassa
19% of 16 decks +12% synergy
Swiftfoot Boots
19% of 16 decks -9% synergy
Enchantments
Efficient Construction
31% of 16 decks +30% synergy
Thopter Spy Network
31% of 16 decks +28% synergy
Pia's Revolution
25% of 16 decks +24% synergy
Storm the Vault
19% of 16 decks +16% synergy
Planeswalkers
Daretti, Scrap Savant
25% of 16 decks +22% synergy
Saheeli, Sublime Artificer
25% of 16 decks +20% synergy
Utility Lands
Seat of the Synod
62% of 16 decks +56% synergy
Ancient Den
50% of 6 decks +45% synergy
Buried Ruin
44% of 16 decks +39% synergy
Urza's Saga
38% of 16 decks +30% synergy
Darksteel Citadel
31% of 16 decks +27% synergy
Academy Ruins
31% of 16 decks +26% synergy
Reliquary Tower
25% of 16 decks -4% synergy
Inventors' Fair
19% of 16 decks +15% synergy
Mana Artifacts
Arcane Signet
75% of 16 decks +3% synergy
Sol Ring
69% of 16 decks -16% synergy
Azorius Signet
50% of 6 decks +24% synergy
Talisman of Creativity
44% of 16 decks +15% synergy
Fellwar Stone
38% of 16 decks +16% synergy
Talisman of Indulgence
38% of 8 decks +11% synergy
Izzet Signet
38% of 16 decks +9% synergy
Mind Stone
31% of 16 decks +14% synergy
Basalt Monolith
25% of 16 decks +22% synergy
Chromatic Lantern
19% of 16 decks +9% synergy
Lands
Xander's Lounge
88% of 8 decks +60% synergy
Blood Crypt
88% of 8 decks +49% synergy
Raugrin Triome
83% of 6 decks +57% synergy
Command Tower
81% of 16 decks +7% synergy
Morphic Pool
75% of 8 decks +49% synergy
Luxury Suite
75% of 8 decks +49% synergy
Watery Grave
75% of 8 decks +34% synergy
Steam Vents
69% of 16 decks +30% synergy
Hallowed Fountain
67% of 6 decks +26% synergy
Shivan Reef
62% of 16 decks +36% synergy
Training Center
56% of 16 decks +29% synergy
Drossforge Bridge
50% of 8 decks +46% synergy
Mistvault Bridge
50% of 8 decks +45% synergy
Silverbluff Bridge
50% of 16 decks +44% synergy
Spectator Seating
50% of 6 decks +25% synergy
Battlefield Forge
50% of 6 decks +25% synergy
Sacred Foundry
50% of 6 decks +14% synergy
Scalding Tarn
44% of 16 decks +33% synergy
Exotic Orchard
38% of 16 decks +2% synergy
Polluted Delta
31% of 16 decks +20% synergy
Cascade Bluffs
31% of 16 decks +19% synergy
Sulfur Falls
31% of 16 decks +1% synergy
Spire of Industry
25% of 16 decks +22% synergy
Bloodstained Mire
25% of 16 decks +15% synergy
Stormcarved Coast
25% of 16 decks +8% synergy
Power Depot
19% of 16 decks +18% synergy
Fabled Passage
19% of 16 decks +10% synergy