Prototype Portal + Gonti's Aether Heart + Thopter Assembly + Ashnod's Altar

Prototype Portal
Gonti's Aether Heart
Thopter Assembly
Ashnod's Altar

Requires
Prototype Portal must be on the battlefield. Gonti's Aether Heart must be in exile (exiled by Prototype Portal). Thopter Assembly must be on the battlefield. Ashnod's Altar must be on the battlefield. You control no other Thopters. Mana needed: 6 each turn
Steps
  1. At the beginning of your upkeep, Thopter Assembly triggers.
  2. Holding priority, activate Prototype Portal by paying 6 and tapping it, creating a token copy of Gonti's Aether Heart.
  3. Gonti's Aether Heart enters the battlefield, causing you to get ee.
  4. Resolve the Thopter Assembly trigger, returning it from the battlefield to your hand and creating five 1/1 Thopter artifact creature tokens.
  5. The Thopters enter the battlefield, triggering Gonti's Aether Heart five times, causing you to get ten e.
  6. Activate Ashnod's Altar five times by sacrificing the five Thopters, adding ten .
  7. Cast Thopter Assembly by paying 6.
  8. Thopter Assembly enter the battlefield, triggering Gonti's Aether Heart, causing you to get ee.
  9. Activate Gonti's Aether Heart by paying eight e and exiling it, causing you to take an extra turn after this one.
  10. Repeat each turn.
Results
Infinite turns.

Breya, Etherium Shaper
0.03% of 13908 decks 4 decks
Oviya Pashiri, Sage Lifecrafter
0.47% of 429 decks 2 decks
Graaz, Unstoppable Juggernaut
0.03% of 3597 decks 1 decks
Dr. Madison Li
0.02% of 4182 decks 1 decks
The Peregrine Dynamo
0.15% of 663 decks 1 decks
Karn, Silver Golem
0.09% of 1054 decks 1 decks
Oswald Fiddlebender
0.06% of 1786 decks 1 decks
Gimbal, Gremlin Prodigy
0.03% of 2858 decks 1 decks
Armix, Filigree Thrasher // Silas Renn, Seeker Adept
0.17% of 576 decks 1 decks
Syr Ginger, the Meal Ender
0.05% of 1977 decks 1 decks
Gonti, Canny Acquisitor
0.02% of 5521 decks 1 decks
High Synergy Cards
Time Sieve
83% of 6 decks +80% synergy
Ancient Den
83% of 6 decks +78% synergy
Etherium Sculptor
75% of 8 decks +70% synergy
Inventors' Fair
73% of 15 decks +70% synergy
Foundry Inspector
67% of 15 decks +62% synergy
Vault of Whispers
67% of 6 decks +62% synergy
Great Furnace
67% of 6 decks +61% synergy
Jhoira, Weatherlight Captain
67% of 6 decks +61% synergy
Sai, Master Thopterist
62% of 8 decks +59% synergy
Krark-Clan Ironworks
60% of 15 decks +59% synergy
Top Cards
Baleful Strix
67% of 6 decks +54% synergy
Kuldotha Forgemaster
53% of 15 decks +53% synergy
Sculpting Steel
53% of 15 decks +51% synergy
Unwinding Clock
53% of 15 decks +51% synergy
Mystic Forge
53% of 15 decks +50% synergy
Master Transmuter
50% of 8 decks +48% synergy
Tezzeret the Seeker
50% of 8 decks +47% synergy
Urza, Lord High Artificer
50% of 8 decks +47% synergy
Junk Diver
47% of 15 decks +46% synergy
Rings of Brighthearth
47% of 15 decks +45% synergy
Creatures
Reckless Fireweaver
50% of 6 decks +46% synergy
Scrap Trawler
47% of 15 decks +45% synergy
Myr Retriever
47% of 15 decks +45% synergy
Shimmer Myr
40% of 15 decks +38% synergy
Myr Battlesphere
40% of 15 decks +38% synergy
Trinket Mage
38% of 8 decks +35% synergy
Emry, Lurker of the Loch
38% of 8 decks +33% synergy
Liberator, Urza's Battlethopter
36% of 14 decks +34% synergy
Mycosynth Golem
33% of 15 decks +33% synergy
Karn, Legacy Reforged
33% of 12 decks +32% synergy
Solemn Simulacrum
33% of 15 decks +19% synergy
Metalwork Colossus
27% of 15 decks +26% synergy
Steel Overseer
27% of 15 decks +25% synergy
Walking Ballista
27% of 15 decks +24% synergy
Arcbound Ravager
20% of 15 decks +20% synergy
Metalworker
20% of 15 decks +20% synergy
Hangarback Walker
20% of 15 decks +19% synergy
Blightsteel Colossus
20% of 15 decks +18% synergy
Jhoira's Familiar
20% of 15 decks +18% synergy
Wurmcoil Engine
20% of 15 decks +18% synergy
Palladium Myr
20% of 15 decks +18% synergy
Instants
Vampiric Tutor
50% of 6 decks +32% synergy
Whir of Invention
38% of 8 decks +34% synergy
Mana Drain
38% of 8 decks +22% synergy
Counterspell
38% of 8 decks -5% synergy
Sorceries
Demonic Tutor
67% of 6 decks +44% synergy
Fabricate
38% of 8 decks +31% synergy
All Is Dust
33% of 15 decks +32% synergy
Utility Artifacts
Thopter Foundry
75% of 4 decks +73% synergy
Bolas's Citadel
50% of 6 decks +41% synergy
Sensei's Divining Top
47% of 15 decks +41% synergy
Clock of Omens
40% of 15 decks +39% synergy
Darksteel Forge
40% of 15 decks +39% synergy
The One Ring
36% of 14 decks +27% synergy
Nim Deathmantle
33% of 15 decks +33% synergy
Mycosynth Lattice
33% of 15 decks +33% synergy
Aetherflux Reservoir
33% of 15 decks +30% synergy
Skullclamp
33% of 15 decks +21% synergy
Sword of the Meek
27% of 15 decks +26% synergy
Voltaic Key
27% of 15 decks +26% synergy
Lithoform Engine
27% of 15 decks +25% synergy
Manifold Key
27% of 15 decks +25% synergy
Hedron Archive
27% of 15 decks +24% synergy
Lightning Greaves
27% of 15 decks +1% synergy
Swiftfoot Boots
27% of 15 decks -1% synergy
Decoction Module
20% of 15 decks +20% synergy
Retrofitter Foundry
20% of 15 decks +20% synergy
Aetherworks Marvel
20% of 15 decks +20% synergy
Planar Bridge
20% of 15 decks +20% synergy
Mirrorworks
20% of 15 decks +19% synergy
Nevinyrral's Disk
20% of 15 decks +19% synergy
Ichor Wellspring
20% of 15 decks +18% synergy
Staff of Domination
20% of 15 decks +18% synergy
Forsaken Monument
20% of 15 decks +18% synergy
Cloud Key
20% of 15 decks +18% synergy
Enchantments
Mechanized Production
38% of 8 decks +35% synergy
Planeswalkers
Daretti, Scrap Savant
50% of 6 decks +48% synergy
Ugin, the Ineffable
27% of 15 decks +25% synergy
Karn, Living Legacy
21% of 14 decks +21% synergy
Karn, the Great Creator
20% of 15 decks +19% synergy
Utility Lands
Seat of the Synod
62% of 8 decks +56% synergy
Buried Ruin
60% of 15 decks +55% synergy
Darksteel Citadel
53% of 15 decks +49% synergy
Fomori Vault
50% of 6 decks +48% synergy
War Room
47% of 15 decks +40% synergy
Urza's Saga
47% of 15 decks +39% synergy
Academy Ruins
38% of 8 decks +33% synergy
Urza's Workshop
36% of 14 decks +35% synergy
Urza's Power Plant
33% of 15 decks +32% synergy
Urza's Mine
33% of 15 decks +32% synergy
Urza's Tower
33% of 15 decks +32% synergy
Rogue's Passage
33% of 15 decks +14% synergy
Blast Zone
27% of 15 decks +25% synergy
Bonders' Enclave
27% of 15 decks +24% synergy
Treasure Vault
27% of 15 decks +24% synergy
Strip Mine
27% of 15 decks +24% synergy
Geier Reach Sanitarium
27% of 15 decks +23% synergy
Karn's Bastion
27% of 15 decks +22% synergy
Ancient Tomb
27% of 15 decks +16% synergy
Reliquary Tower
27% of 15 decks -3% synergy
Deserted Temple
20% of 15 decks +19% synergy
Inkmoth Nexus
20% of 15 decks +19% synergy
Tomb of the Spirit Dragon
20% of 15 decks +19% synergy
Shrine of the Forsaken Gods
20% of 15 decks +19% synergy
Ghost Quarter
20% of 15 decks +18% synergy
Temple of the False God
20% of 15 decks +10% synergy
Mana Artifacts
Sol Ring
100% of 15 decks +16% synergy
Dimir Signet
67% of 6 decks +37% synergy
Arcane Signet
60% of 15 decks -12% synergy
Izzet Signet
50% of 6 decks +22% synergy
Talisman of Dominance
50% of 6 decks +19% synergy
Basalt Monolith
40% of 15 decks +37% synergy
Mana Crypt
40% of 15 decks +32% synergy
Liquimetal Torque
33% of 15 decks +30% synergy
Everflowing Chalice
33% of 15 decks +29% synergy
Thran Dynamo
33% of 15 decks +29% synergy
Mana Vault
33% of 15 decks +27% synergy
Thought Vessel
33% of 15 decks +16% synergy
Mind Stone
33% of 15 decks +16% synergy
Fellwar Stone
33% of 15 decks +12% synergy
Blinkmoth Urn
20% of 15 decks +20% synergy
Grim Monolith
20% of 15 decks +18% synergy
Mox Amber
20% of 15 decks +16% synergy
Mox Opal
20% of 15 decks +16% synergy
Lands
Steam Vents
83% of 6 decks +44% synergy
Hallowed Fountain
80% of 5 decks +39% synergy
Blood Crypt
75% of 4 decks +36% synergy
Godless Shrine
75% of 4 decks +34% synergy
Watery Grave
67% of 6 decks +26% synergy
Raugrin Triome
60% of 5 decks +33% synergy
Sacred Foundry
60% of 5 decks +24% synergy
Command Tower
53% of 15 decks -21% synergy
Mistvault Bridge
50% of 6 decks +45% synergy
Morphic Pool
50% of 6 decks +24% synergy
Sulfur Falls
50% of 6 decks +19% synergy
Exotic Orchard
40% of 15 decks +4% synergy
Hall of Tagsin
29% of 14 decks +28% synergy
The Mycosynth Gardens
29% of 14 decks +26% synergy
Mirrex
21% of 14 decks +20% synergy
Glimmervoid
20% of 15 decks +20% synergy
Power Depot
20% of 15 decks +19% synergy
Spire of Industry
20% of 15 decks +17% synergy