Training Grounds + Grim Monolith + Karn, Silver Golem

Training Grounds
Grim Monolith
Karn, Silver Golem

Requires
Training Grounds must be on the battlefield. Grim Monolith must be on the battlefield. Karn, Silver Golem must be on the battlefield. Grim Monolith does not have summoning sickness.
Steps
  1. Activate Grim Monolith's first ability by tapping it, adding .
  2. Activate Karn by paying 1, causing Grim Monolith to become an artifact creature until end of turn.
  3. Activate Grim Monolith's last ability by paying 2, untapping it.
  4. Repeat step 1 and 3.
Results
Infinite colorless mana.

Memnarch
0.56% of 1418 decks 8 decks
Urza, Lord High Artificer
0.06% of 11942 decks 7 decks
High Synergy Cards
Biomancer's Familiar
86% of 7 decks +85% synergy
Basalt Monolith
82% of 33 decks +79% synergy
Enlightened Tutor
80% of 5 decks +72% synergy
Seedborn Muse
71% of 7 decks +68% synergy
Mana Vault
70% of 33 decks +63% synergy
Urza's Saga
70% of 30 decks +63% synergy
Fabricate
64% of 33 decks +61% synergy
Top Cards
Rings of Brighthearth
58% of 33 decks +56% synergy
Counterspell
55% of 33 decks +34% synergy
The One Ring
54% of 13 decks +45% synergy
Cyclonic Rift
52% of 33 decks +38% synergy
Mycosynth Lattice
48% of 33 decks +48% synergy
Unwinding Clock
48% of 33 decks +46% synergy
Rhystic Study
48% of 33 decks +35% synergy
Fierce Guardianship
48% of 31 decks +40% synergy
Tezzeret the Seeker
45% of 33 decks +44% synergy
Mox Opal
45% of 33 decks +41% synergy
Creatures
Academy Rector
60% of 5 decks +60% synergy
Bloom Tender
43% of 7 decks +39% synergy
Birds of Paradise
43% of 7 decks +30% synergy
Etherium Sculptor
42% of 33 decks +40% synergy
Emry, Lurker of the Loch
39% of 31 decks +37% synergy
Metalworker
36% of 33 decks +36% synergy
Karn, Legacy Reforged
36% of 11 decks +35% synergy
Phyrexian Metamorph
33% of 33 decks +30% synergy
Voltaic Construct
30% of 33 decks +30% synergy
Grand Architect
30% of 33 decks +30% synergy
Pili-Pala
30% of 33 decks +30% synergy
Trinket Mage
30% of 33 decks +29% synergy
Blightsteel Colossus
30% of 33 decks +29% synergy
Thought Monitor
30% of 30 decks +28% synergy
Sai, Master Thopterist
29% of 31 decks +27% synergy
Master Transmuter
27% of 33 decks +26% synergy
Trophy Mage
25% of 32 decks +24% synergy
Padeem, Consul of Innovation
25% of 32 decks +23% synergy
Walking Ballista
25% of 32 decks +22% synergy
Foundry Inspector
25% of 32 decks +21% synergy
Vedalken Archmage
24% of 33 decks +24% synergy
Spellskite
24% of 33 decks +23% synergy
Jin-Gitaxias, Progress Tyrant
24% of 29 decks +23% synergy
Urza, Lord High Artificer
23% of 31 decks +21% synergy
Faerie Mastermind
21% of 14 decks +18% synergy
Myr Retriever
21% of 33 decks +19% synergy
Cyberdrive Awakener
21% of 29 decks +19% synergy
The Reality Chip
21% of 29 decks +19% synergy
Displacer Kitten
20% of 20 decks +17% synergy
Treasure Mage
18% of 33 decks +18% synergy
Arcum Dagsson
18% of 33 decks +18% synergy
Deadeye Navigator
18% of 33 decks +17% synergy
Palladium Myr
18% of 33 decks +16% synergy
Consecrated Sphinx
18% of 33 decks +16% synergy
Liberator, Urza's Battlethopter
16% of 19 decks +14% synergy
Palinchron
15% of 33 decks +15% synergy
Gilded Drake
15% of 33 decks +14% synergy
Peregrine Drake
15% of 33 decks +13% synergy
Solemn Simulacrum
15% of 33 decks +1% synergy
Hullbreaker Horror
14% of 29 decks +10% synergy
Tribute Mage
13% of 31 decks +12% synergy
Clever Impersonator
12% of 32 decks +11% synergy
Vedalken Engineer
12% of 33 decks +12% synergy
Darksteel Colossus
12% of 33 decks +12% synergy
Mycosynth Golem
12% of 33 decks +12% synergy
Kuldotha Forgemaster
12% of 33 decks +11% synergy
Silver Myr
12% of 33 decks +11% synergy
Wurmcoil Engine
12% of 33 decks +10% synergy
Agent of Treachery
10% of 31 decks +9% synergy
Thassa's Oracle
10% of 31 decks +6% synergy
Instants
Mana Drain
61% of 33 decks +53% synergy
Vampiric Tutor
57% of 7 decks +48% synergy
Force of Will
48% of 33 decks +43% synergy
Dramatic Reversal
41% of 32 decks +38% synergy
Force of Negation
39% of 31 decks +34% synergy
Whir of Invention
38% of 32 decks +36% synergy
Swan Song
34% of 32 decks +26% synergy
Mystical Tutor
30% of 33 decks +23% synergy
Brainstorm
27% of 33 decks +17% synergy
Cryptic Command
21% of 33 decks +20% synergy
Archmage's Charm
19% of 31 decks +19% synergy
Capsize
18% of 33 decks +18% synergy
Pact of Negation
18% of 33 decks +14% synergy
Blue Sun's Zenith
15% of 33 decks +14% synergy
High Tide
15% of 33 decks +13% synergy
Negate
15% of 33 decks +4% synergy
An Offer You Can't Refuse
13% of 23 decks +3% synergy
Narset's Reversal
13% of 31 decks +11% synergy
Intuition
12% of 33 decks +11% synergy
Flusterstorm
12% of 33 decks +9% synergy
Hurkyl's Recall
9% of 33 decks +9% synergy
Long-Term Plans
9% of 33 decks +9% synergy
Muddle the Mixture
9% of 33 decks +7% synergy
Pongify
9% of 33 decks +3% synergy
Arcane Denial
9% of 33 decks -0% synergy
Sorceries
Demonic Tutor
57% of 7 decks +45% synergy
Damnation
43% of 7 decks +39% synergy
Toxic Deluge
43% of 7 decks +34% synergy
Transmute Artifact
27% of 33 decks +27% synergy
Thoughtcast
27% of 33 decks +26% synergy
Reshape
24% of 33 decks +23% synergy
Merchant Scroll
21% of 33 decks +20% synergy
Ponder
21% of 33 decks +15% synergy
Rise and Shine
20% of 30 decks +19% synergy
Windfall
12% of 33 decks +6% synergy
Argivian Restoration
9% of 33 decks +9% synergy
Preordain
9% of 33 decks +4% synergy
Utility Artifacts
The Enigma Jewel
43% of 7 decks +42% synergy
Voltaic Key
42% of 33 decks +42% synergy
Isochron Scepter
39% of 33 decks +37% synergy
Sensei's Divining Top
39% of 33 decks +34% synergy
Lightning Greaves
39% of 33 decks +14% synergy
Darksteel Forge
36% of 33 decks +35% synergy
Mystic Forge
35% of 31 decks +33% synergy
Manifold Key
32% of 31 decks +31% synergy
Sculpting Steel
27% of 33 decks +25% synergy
Staff of Domination
24% of 33 decks +22% synergy
Swiftfoot Boots
24% of 33 decks -4% synergy
Forsaken Monument
23% of 31 decks +21% synergy
Liquimetal Coating
21% of 33 decks +21% synergy
Clock of Omens
21% of 33 decks +20% synergy
Lithoform Engine
19% of 31 decks +18% synergy
Heartstone
18% of 33 decks +18% synergy
Nevinyrral's Disk
18% of 33 decks +17% synergy
Cloud Key
18% of 33 decks +16% synergy
Skullclamp
18% of 33 decks +6% synergy
Moonsilver Key
17% of 29 decks +16% synergy
Umbral Mantle
15% of 33 decks +14% synergy
Illusionist's Bracers
15% of 33 decks +14% synergy
Mishra's Bauble
15% of 33 decks +14% synergy
Elixir of Immortality
15% of 33 decks +13% synergy
Sapphire Medallion
15% of 33 decks +13% synergy
Thousand-Year Elixir
15% of 33 decks +13% synergy
Nettlecyst
13% of 30 decks +12% synergy
Mirage Mirror
12% of 32 decks +11% synergy
Aetherflux Reservoir
12% of 32 decks +9% synergy
Urza's Bauble
12% of 33 decks +12% synergy
Winter Orb
12% of 33 decks +11% synergy
Mirrorworks
12% of 33 decks +11% synergy
Tormod's Crypt
12% of 33 decks +11% synergy
Vedalken Orrery
12% of 33 decks +11% synergy
Ashnod's Altar
12% of 33 decks +4% synergy
Ring of Three Wishes
9% of 33 decks +9% synergy
Doubling Cube
9% of 33 decks +9% synergy
Welding Jar
9% of 33 decks +9% synergy
Aether Spellbomb
9% of 33 decks +8% synergy
Nim Deathmantle
9% of 33 decks +8% synergy
Krark-Clan Ironworks
9% of 33 decks +8% synergy
Scroll Rack
9% of 33 decks +7% synergy
Howling Mine
9% of 33 decks +7% synergy
Expedition Map
9% of 33 decks +6% synergy
Enchantments
Power Artifact
33% of 33 decks +33% synergy
Mystic Remora
27% of 33 decks +18% synergy
Copy Artifact
18% of 33 decks +18% synergy
Propaganda
15% of 33 decks +10% synergy
Artificer Class
15% of 20 decks +14% synergy
Mechanized Production
12% of 32 decks +11% synergy
Freed from the Real
12% of 33 decks +11% synergy
Mirrodin Besieged
10% of 31 decks +9% synergy
Efficient Construction
9% of 32 decks +9% synergy
Back to Basics
9% of 33 decks +9% synergy
Leyline of Anticipation
9% of 33 decks +7% synergy
Planeswalkers
Karn, the Great Creator
35% of 31 decks +34% synergy
Tezzeret, Betrayer of Flesh
17% of 29 decks +17% synergy
Ugin, the Ineffable
16% of 31 decks +14% synergy
Narset, Parter of Veils
16% of 31 decks +13% synergy
Tezzeret, Artifice Master
13% of 31 decks +12% synergy
Karn, Scion of Urza
10% of 31 decks +9% synergy
Utility Lands
Academy Ruins
61% of 33 decks +58% synergy
Inventors' Fair
50% of 32 decks +46% synergy
Seat of the Synod
48% of 33 decks +45% synergy
Darksteel Citadel
48% of 33 decks +44% synergy
Ancient Tomb
48% of 33 decks +38% synergy
Alchemist's Refuge
43% of 7 decks +41% synergy
Cabal Coffers
43% of 7 decks +37% synergy
Boseiju, Who Endures
43% of 7 decks +34% synergy
Reliquary Tower
36% of 33 decks +7% synergy
Otawara, Soaring City
34% of 29 decks +26% synergy
Tolaria West
33% of 33 decks +33% synergy
Urza's Workshop
26% of 19 decks +25% synergy
Buried Ruin
24% of 33 decks +19% synergy
Urza's Power Plant
21% of 33 decks +19% synergy
Urza's Tower
21% of 33 decks +19% synergy
Urza's Mine
21% of 33 decks +19% synergy
Mystic Sanctuary
19% of 31 decks +13% synergy
Treasure Vault
17% of 29 decks +15% synergy
Castle Vantress
16% of 31 decks +14% synergy
Mishra's Workshop
15% of 33 decks +15% synergy
Urborg, Tomb of Yawgmoth
15% of 33 decks +5% synergy
Urza's Factory
12% of 33 decks +12% synergy
Crystal Vein
12% of 33 decks +11% synergy
Minamo, School at Water's Edge
12% of 33 decks +10% synergy
Thespian's Stage
12% of 33 decks +10% synergy
Arcane Lighthouse
9% of 32 decks +8% synergy
Oboro, Palace in the Clouds
9% of 33 decks +9% synergy
Halimar Depths
9% of 33 decks +8% synergy
Strip Mine
9% of 33 decks +6% synergy
Temple of the False God
9% of 33 decks -1% synergy
Mana Artifacts
Sol Ring
91% of 33 decks +6% synergy
Arcane Signet
58% of 31 decks -13% synergy
Mana Crypt
55% of 33 decks +43% synergy
Simic Signet
43% of 7 decks +40% synergy
Thran Dynamo
39% of 33 decks +35% synergy
Jeweled Lotus
37% of 30 decks +29% synergy
Gilded Lotus
33% of 33 decks +30% synergy
Lotus Petal
30% of 33 decks +24% synergy
Liquimetal Torque
30% of 30 decks +26% synergy
Everflowing Chalice
27% of 33 decks +22% synergy
Chrome Mox
27% of 33 decks +21% synergy
Fellwar Stone
24% of 33 decks +3% synergy
Mind Stone
21% of 33 decks +4% synergy
Chromatic Orrery
19% of 31 decks +18% synergy
Caged Sun
18% of 33 decks +16% synergy
Mox Amber
16% of 31 decks +12% synergy
Worn Powerstone
15% of 33 decks +12% synergy
Thought Vessel
12% of 32 decks -4% synergy
Gemstone Array
12% of 33 decks +12% synergy
Extraplanar Lens
12% of 33 decks +11% synergy
Mox Diamond
12% of 33 decks +8% synergy
Commander's Sphere
9% of 32 decks -6% synergy
Paradise Mantle
9% of 33 decks +8% synergy
Sky Diamond
9% of 33 decks +6% synergy
Lands
Spara's Headquarters
100% of 3 decks +96% synergy
Breeding Pool
86% of 7 decks +77% synergy
Temple Garden
75% of 4 decks +66% synergy
Hallowed Fountain
60% of 5 decks +51% synergy
Simic Growth Chamber
57% of 7 decks +53% synergy
Watery Grave
57% of 7 decks +47% synergy
Morphic Pool
50% of 6 decks +43% synergy
Drowned Catacomb
43% of 7 decks +37% synergy
Command Tower
30% of 33 decks -43% synergy
The Mycosynth Gardens
27% of 15 decks +24% synergy
Polluted Delta
21% of 33 decks +10% synergy
Flooded Strand
18% of 33 decks +8% synergy
Prismatic Vista
13% of 31 decks +7% synergy
Scalding Tarn
12% of 33 decks +1% synergy
Exotic Orchard
12% of 33 decks -23% synergy
Fabled Passage
10% of 31 decks +0% synergy
Windswept Heath
9% of 33 decks -1% synergy
Misty Rainforest
9% of 33 decks -3% synergy