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Karn, Legacy Reforged

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Karn, Legacy Reforged

At a glance

  • Commander: Karn, Legacy Reforged
  • Archetype: Colorless artifact ramp / big-mana value
  • Power tier: mid-high

Cards

Commander

Karn, Legacy Reforged — Legendary Artifact Creature — Golem

Karn’s power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add for each artifact you control. This mana can’t be spent to cast nonartifact spells. Until end of turn, you don’t lose this mana as steps and phases end.

Discrepancy note vs. the scout text: the assignment paraphrase said Karn adds “for each artifact you tapped for mana last turn” and “doubles your rock-based mana.” That is WRONG. The printed ability adds for each artifact you control — tapped or not — every upkeep, and that mana is locked to artifact spells/abilities only. So the engine isn’t about re-tapping rocks; it’s about flooding the board with cheap permanents (any artifact, even a dead bauble) and converting raw artifact count into a huge colorless pool each turn. Confirmed against printed Oracle text; commander_oracle_ok = true.

Gameplan

A pure colorless artifact ramp/value pile. Vomit cheap artifacts onto the board — mana rocks, cantrip baubles, equipment-free junk, mana creatures — and let Karn turn artifact count into an avalanche of colorless mana every upkeep. That mana (artifact-locked) dumps into oversized colorless artifact creatures and Eldrazi as inevitable finishers. Karn himself is a free win-adjacent threat: his power equals the greatest MV among your artifacts, so with a Sisay’s Ring (4) or an 8-MV Eldrazi-side artifact out he swings as a fat beater that the artifact-mana keeps refueling.

The deck wins by inevitability: a mana advantage no commons deck can match, casting an oversized threat every turn until the board is buried.

Key synergies

  • Artifact count = everything. Every artifact you control pumps Karn’s upkeep mana AND raises his P/T ceiling. Even “spent” pieces matter: Ichor Wellspring, Mind Stone, the land-fetch baubles all sit as artifacts before they cantrip, and several (Wellspring, Chromatic-style) draw again on death.
  • Foundry Inspector makes every artifact cheaper — turns the cheap-rock shell into a turbo deploy engine, getting more bodies down faster for Karn.
  • Tron + Locus + Sisay’s Ring / Ur-Golem’s Eye push real colorless mana on top of Karn’s upkeep flood, letting you hardcast Ulamog’s Crusher / Hand of Emrakul / Marut ahead of curve. Powerstone Shard scales with copies (only one here, but still a source) and Stone Retrieval Unit drops a Powerstone token that’s both extra artifact-count for Karn and artifact-locked mana.
  • Affinity payoffs (Myr Enforcer, Razorfield Thresher, Sojourner’s Companion, Sea Gate Colossus) get dirt-cheap off the wide artifact board — another way the rock-pile converts directly into beef.
  • Annihilator inevitability: Ulamog’s Crusher (Annihilator 2) and Hand of Emrakul (Annihilator 1) substitute for the board wipes colorless commons lack — they strip opposing boards a permanent at a time each swing.

Role breakdown (with counts)

  • Lands — 37: 20 Wastes + Darksteel Citadel (also an artifact for Karn) + Urza Tron (Mine/Power Plant/Tower) + Cloudpost + Glimmerpost (Locus) + fixing/utility (Ash Barrens, Crumbling Vestige, Warped Landscape, Terminal Moraine, Tocasia’s Dig Site, Holdout Settlement) + interaction lands (Desert, Quicksand, Sunscorched Desert) + Radiant Fountain.
  • Ramp (mana rocks/creatures) — 15: Sol Ring, Everflowing Chalice, Mind Stone, Guardian Idol, Fractured Powerstone, Prismatic Lens, Hierophant’s Chalice, Orazca Relic, Pristine Talisman, Seer’s Lantern, Sisay’s Ring, Ur-Golem’s Eye, Powerstone Shard, Hedron Crawler, Manakin. (Cathodion = death-ramp; Stone Retrieval Unit makes a Powerstone — both also fuel Karn.)
  • Card advantage — 9: Skyscanner, Filigree Familiar, Ichor Wellspring, Spare Supplies, Prophetic Prism, Guild Globe, Jalum Tome, Energy Refractor, plus Mind Stone’s sac mode. (Land-fetch baubles — Expedition Map, Wayfarer’s Bauble, Armillary Sphere, Renegade Map, Skittering Surveyor — add card selection / fix land drops.)
  • Spot removal / interaction — 11: Universal Solvent, Thaumaton Torpedo, Scrap Compactor, Unstable Obelisk, Scalding Cauldron, Silent Dart, Vial of Dragonfire, Gremlin Mine, Lunatic Pandora, Urn of Godfire, Runaway Boulder.
  • Mass / pseudo-wipe — 0 true: colorless commons have no real board wipe. Compensated by Annihilator finishers (Ulamog’s Crusher, Hand of Emrakul, Marut), repeatable artifact removal, and raw mana inevitability.
  • Beaters / finishers — ~16: Iron Bully, Bottle Golems, Razorfield Rhino, Will-Forged Golem, Pardic Wanderer, Phyrexian Hulk, Maelstrom Colossus, Ebony Rhino, Iron Giant, Hexplate Golem, Myr Enforcer, Razorfield Thresher, Accomplished Automaton, Sojourner’s Companion, Eldrazi Devastator, Ulamog’s Crusher, Hand of Emrakul, Marut, Kozilek’s Pathfinder, Ruin Processor, Sea Gate Colossus.

Manabase / fixing note

Colorless identity means no colored sources — the base is 20 Wastes + 17 colorless utility lands = 37, all producing (or sacrificing for fixing/value). Tron (Urza’s Mine/Power Plant/Tower) and the Locus pair (Cloudpost/Glimmerpost) are the high-end mana engine; assembled Tron or multiple Loci push you to double-digit mana fast. Land-fetch artifacts (Expedition Map, Wayfarer’s Bauble, Renegade Map, Armillary Sphere, Skittering Surveyor) smooth land drops and dig toward Tron/Locus pieces. No color fixing is needed — every spell is colorless, so any source casts anything.

Pilot notes

  • Mulligan for a turn-1 rock (Sol Ring ideal) plus a couple of cheap artifacts. You want artifacts on the board before Karn so his first upkeep already prints meaningful mana.
  • Remember Karn’s upkeep mana is artifact-locked — bank it for mana rocks’ activated abilities and your oversized artifact creatures. The big Eldrazi (Ulamog’s Crusher, Hand of Emrakul, Eldrazi Devastator, Kozilek’s Pathfinder, Ruin Processor, Scion-less spirits) are NOT artifacts, so pay for those with land mana / Tron / Sisay’s Ring while Karn’s pool feeds the artifact half of the curve.
  • Drop Foundry Inspector early — the -off discount compounds across a turn of deploying multiple rocks.
  • Don’t be shy holding interaction baubles; with so many cheap artifacts you can chump-deploy junk just to inflate Karn’s mana and toughness.
  • Sequence Tron/Locus fetches before random Wastes so you hit the mana spikes.

Weaknesses

  • No board wipes. A go-wide aggressive table can race you before inevitability kicks in; you lean on Annihilator and spot removal to stabilize, which can be too slow vs. three opponents.
  • Artifact hate is brutal. A single Vandalblast / Bane of Progress-style effect (which opponents in color can run) blanks Karn’s engine and most of the deck.
  • Slow interaction. Most removal is sac-an-artifact-pay-a-lot (Universal Solvent at , Thaumaton Torpedo at ) — fine with Karn’s mana flood, painful before it.
  • Karn dies, mana shrinks. He’s the linchpin; repeated commander removal taxes you via command-tax and removes the upkeep ramp.

Decklist

⬇ Download as .txt — paste into Moxfield, Archidekt, or MTG Arena.

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