Thran Dynamo + Umbral Mantle + Xenic Poltergeist

Thran Dynamo
Umbral Mantle
Xenic Poltergeist

Requires
Thran Dynamo must be on the battlefield. Umbral Mantle must be on the battlefield. Xenic Poltergeist must be on the battlefield. Thran Dynamo and Xenic Poltergeist does not have summoning sickness.
Steps
  1. Activate Xenic Poltergeist by tapping it, targeting Thran Dynamo.
  2. Activate Umbral Mantle's equip ability by paying 0, attaching it to the Thran Dynamo.
  3. Activate Thran Dynamo by tapping it, adding .
  4. Activate Umbral Mantle by paying 3 and untapping it, giving itself +2/+2 until end of turn.
  5. Repeat.
Results
Infinitely large Thran Dynamo until end of turn.

Shauku, Endbringer
2.78% of 108 decks 3 decks
King Macar, the Gold-Cursed
0.34% of 872 decks 3 decks
Merieke Ri Berit
0.11% of 1829 decks 2 decks
Nefarox, Overlord of Grixis
1.05% of 95 decks 1 decks
Kenrith, the Returned King
0.00% of 21513 decks 1 decks
Acererak the Archlich
0.09% of 1084 decks 1 decks
Trazyn the Infinite
0.05% of 1990 decks 1 decks
Sharkey, Tyrant of the Shire
1.25% of 80 decks 1 decks
High Synergy Cards
Cabal Coffers
69% of 13 decks +58% synergy
Magus of the Coffers
54% of 13 decks +53% synergy
Sign in Blood
62% of 13 decks +52% synergy
Thousand-Year Elixir
54% of 13 decks +52% synergy
Cabal Stronghold
54% of 13 decks +50% synergy
Puppet Strings
46% of 13 decks +46% synergy
Voltaic Construct
46% of 13 decks +46% synergy
Staff of Domination
46% of 13 decks +44% synergy
Exsanguinate
46% of 13 decks +41% synergy
Sword of the Paruns
38% of 13 decks +38% synergy
Top Cards
Mind Stone
54% of 13 decks +36% synergy
Swiftfoot Boots
54% of 13 decks +26% synergy
Patriar's Seal
46% of 13 decks +44% synergy
Basalt Monolith
46% of 13 decks +43% synergy
Gilded Lotus
46% of 13 decks +43% synergy
Dark Ritual
46% of 13 decks +24% synergy
Magewright's Stone
38% of 13 decks +38% synergy
Paradise Mantle
38% of 13 decks +38% synergy
Illusionist's Bracers
38% of 13 decks +37% synergy
Liliana of the Dark Realms
38% of 13 decks +37% synergy
Creatures
Vizier of Tumbling Sands
75% of 4 decks +74% synergy
Dread Presence
38% of 13 decks +37% synergy
Crypt Ghast
38% of 13 decks +34% synergy
Gray Merchant of Asphodel
38% of 13 decks +29% synergy
Pili-Pala
31% of 13 decks +30% synergy
Marionette Master
31% of 13 decks +27% synergy
Karn, Silver Golem
23% of 13 decks +23% synergy
Voltaic Servant
23% of 13 decks +23% synergy
Royal Assassin
23% of 13 decks +22% synergy
Nirkana Revenant
23% of 13 decks +22% synergy
Palladium Myr
23% of 13 decks +21% synergy
Instants
Stinging Study
23% of 13 decks +22% synergy
Defile
23% of 13 decks +20% synergy
Malakir Rebirth
23% of 13 decks +15% synergy
Vampiric Tutor
23% of 13 decks +5% synergy
Sorceries
Mutilate
31% of 13 decks +29% synergy
Torment of Hailfire
31% of 13 decks +26% synergy
Read the Bones
31% of 13 decks +23% synergy
Demonic Tutor
31% of 13 decks +8% synergy
Diabolic Tutor
23% of 13 decks +17% synergy
Diabolic Intent
23% of 13 decks +14% synergy
Night's Whisper
23% of 13 decks +14% synergy
Toxic Deluge
23% of 13 decks +6% synergy
Utility Artifacts
Rings of Brighthearth
38% of 13 decks +37% synergy
Lightning Greaves
38% of 13 decks +13% synergy
Jandor's Saddlebags
31% of 13 decks +31% synergy
Unlicensed Hearse
31% of 13 decks +30% synergy
Nim Deathmantle
31% of 13 decks +30% synergy
Voltaic Key
31% of 13 decks +30% synergy
Clock of Omens
31% of 13 decks +30% synergy
Expedition Map
31% of 13 decks +28% synergy
Shadowspear
31% of 13 decks +27% synergy
Ashnod's Altar
31% of 13 decks +23% synergy
Mobile Garrison
23% of 13 decks +23% synergy
Thornbite Staff
23% of 13 decks +22% synergy
Haunted Cloak
23% of 13 decks +22% synergy
Trading Post
23% of 13 decks +22% synergy
Lithoform Engine
23% of 13 decks +22% synergy
Manifold Key
23% of 13 decks +22% synergy
Unwinding Clock
23% of 13 decks +20% synergy
Strionic Resonator
23% of 13 decks +20% synergy
Enchantments
March of the Machines
75% of 4 decks +75% synergy
Greed
31% of 13 decks +28% synergy
Necropotence
31% of 13 decks +25% synergy
Phyrexian Arena
23% of 13 decks +8% synergy
Utility Lands
Urborg, Tomb of Yawgmoth
38% of 13 decks +29% synergy
Maze of Ith
31% of 13 decks +28% synergy
Bojuka Bog
31% of 13 decks +0% synergy
Deserted Temple
23% of 13 decks +23% synergy
Arcane Lighthouse
23% of 13 decks +22% synergy
Strip Mine
23% of 13 decks +20% synergy
Mana Artifacts
Sol Ring
85% of 13 decks +0% synergy
Caged Sun
38% of 13 decks +36% synergy
Worn Powerstone
38% of 13 decks +36% synergy
Arcane Signet
38% of 13 decks -34% synergy
Hedron Archive
31% of 13 decks +28% synergy
Liquimetal Torque
31% of 13 decks +27% synergy
Charcoal Diamond
31% of 13 decks +25% synergy
Gemstone Array
23% of 13 decks +23% synergy
Chromatic Orrery
23% of 13 decks +22% synergy
Everflowing Chalice
23% of 13 decks +18% synergy
Lands
Holdout Settlement
23% of 13 decks +22% synergy
Survivors' Encampment
23% of 13 decks +22% synergy