Oversoul
The Tentacled One
This guy's name is ridiculous, but I am going to make so very many +1/+1 counters.
Commander:
1 Mm'menon, Uthros Exile
1 Academy Ruins
1 Aether Spellbomb
1 Agatha's Soul Cauldron
1 Ancient Tomb
1 Animation Module
1 Arcane Denial
1 Arid Mesa
1 Ashnod's Altar
1 Bloodstained Mire
1 Brainstorm
1 Buried Ruin
1 Chaos Warp
1 City of Traitors
1 Clock of Omens
1 Commander's Sphere
1 Counterspell
1 Crime Novelist
1 Crystal Vein
1 Crystalline Crawler
1 Cyclonic Rift
1 Darksteel Citadel
1 Echo of Eons
1 Fabricate
1 Flooded Strand
1 Force of Will
1 Goblin Engineer
1 Goblin Welder
1 Great Furnace
1 Grim Monolith
1 Hall of Tagsin
1 Hangarback Walker
1 Inventors' Fair
5 Island
1 Junk Diver
1 Karn's Bastion
1 Krark-Clan Ironworks
1 Lightning Greaves
1 Lion's Eye Diamond
1 Mana Drain
1 Manifold Key
1 Maze of Ith
1 Memory Jar
1 Metalworker
1 Mindless Automaton
1 Mishra's Workshop
1 Misty Rainforest
5 Mountain
1 Mox Opal
1 Myr Retriever
1 Mystical Tutor
1 Nim Deathmantle
1 Pentavus
1 Polluted Delta
1 Pyrite Spellbomb
1 Sai, Master Thopterist
1 Scalding Tarn
1 Scrap Trawler
1 Scrap Welder
1 Scrapyard Recombiner
1 Seat of the Synod
1 Sensei's Divining Top
1 Skullclamp
1 Solemn Simulacrum
1 Steam Vents
1 Steel Overseer
1 Storm the Vault
1 Strip Mine
1 Su-Chi
1 Tarrian's Soulcleaver
1 Tetravus
1 Tezzeret the Seeker
1 The Ozolith
1 Thopter Squadron
1 Thought Monitor
1 Thran Dynamo
1 Threefold Thunderhulk
1 Time Spiral
1 Transmute Artifact
1 Trash for Treasure
1 Treasure Vault
1 Triskelavus
1 Urza, Lord High Artificer
1 Urza's Saga
1 Volcanic Island
1 Voltaic Key
1 Walking Ballista
1 Wayfarer's Bauble
1 Wheel of Fortune
1 Whir of Invention
1 Wooded Foothills
1 Workhorse
Commander:
1 Mm'menon, Uthros Exile
1 Academy Ruins
1 Aether Spellbomb
1 Agatha's Soul Cauldron
1 Ancient Tomb
1 Animation Module
1 Arcane Denial
1 Arid Mesa
1 Ashnod's Altar
1 Bloodstained Mire
1 Brainstorm
1 Buried Ruin
1 Chaos Warp
1 City of Traitors
1 Clock of Omens
1 Commander's Sphere
1 Counterspell
1 Crime Novelist
1 Crystal Vein
1 Crystalline Crawler
1 Cyclonic Rift
1 Darksteel Citadel
1 Echo of Eons
1 Fabricate
1 Flooded Strand
1 Force of Will
1 Goblin Engineer
1 Goblin Welder
1 Great Furnace
1 Grim Monolith
1 Hall of Tagsin
1 Hangarback Walker
1 Inventors' Fair
5 Island
1 Junk Diver
1 Karn's Bastion
1 Krark-Clan Ironworks
1 Lightning Greaves
1 Lion's Eye Diamond
1 Mana Drain
1 Manifold Key
1 Maze of Ith
1 Memory Jar
1 Metalworker
1 Mindless Automaton
1 Mishra's Workshop
1 Misty Rainforest
5 Mountain
1 Mox Opal
1 Myr Retriever
1 Mystical Tutor
1 Nim Deathmantle
1 Pentavus
1 Polluted Delta
1 Pyrite Spellbomb
1 Sai, Master Thopterist
1 Scalding Tarn
1 Scrap Trawler
1 Scrap Welder
1 Scrapyard Recombiner
1 Seat of the Synod
1 Sensei's Divining Top
1 Skullclamp
1 Solemn Simulacrum
1 Steam Vents
1 Steel Overseer
1 Storm the Vault
1 Strip Mine
1 Su-Chi
1 Tarrian's Soulcleaver
1 Tetravus
1 Tezzeret the Seeker
1 The Ozolith
1 Thopter Squadron
1 Thought Monitor
1 Thran Dynamo
1 Threefold Thunderhulk
1 Time Spiral
1 Transmute Artifact
1 Trash for Treasure
1 Treasure Vault
1 Triskelavus
1 Urza, Lord High Artificer
1 Urza's Saga
1 Volcanic Island
1 Voltaic Key
1 Walking Ballista
1 Wayfarer's Bauble
1 Wheel of Fortune
1 Whir of Invention
1 Wooded Foothills
1 Workhorse