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Kelsien, the Plague

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Kelsien, the Plague

At a glance

  • Commander: Kelsien, the Plague
  • Colors: Mardu
  • Archetype: Mardu pinger-control / creature toolbox
  • Power tier: mid-high

Cards

Commander

Kelsien, the Plague — , Legendary Creature — Human Assassin (3/3)

Vigilance, haste Kelsien gets +1/+1 for each experience counter you have. : Kelsien deals 1 damage to target creature you don’t control. When that creature dies this turn, you get an experience counter.

Kelsien is a repeatable removal cannon that doubles as a self-growing clock. Every turn he taps to ping a creature; if that creature dies that turn — from the ping itself, from combat, from a wipe, from another spell — you bank a permanent experience counter and Kelsien gets bigger. He’s commander_oracle_ok = true: the printed card matches the scout’s paraphrase (vigilance/haste, +1/+1 per experience, tap-to-ping-and-grow). The assignment’s “deathtouch pinger” idea is a nudge, not on the card — I lean into it with deathtouch bodies and equipment but the core engine is the ping + death trigger.

Gameplan

A Mardu attrition-control deck that grinds the board to zero and rides card advantage to inevitability. Early turns: fix mana, deploy a pinger or two, and start trading one-for-one with the densest cheap-removal suite the commons pool offers. Mid-game: land Kelsien, and now every removal spell or wipe that finishes a creature you’ve pinged hands you an experience counter. The board stays clear while Kelsien climbs from 3/3 toward a 7/7+ vigilant, hasty body that swings every turn and still blocks. Monarch and black card-draw refill your hand so you out-resource the table.

Key synergy lines

  • Kelsien + any death = experience. Ping a creature, then kill it the same turn with a burn spell, an edict, combat, or a wipe. Each death = +1/+1 forever. With a sweeper out, a single ping into Pestilence/Drown can net multiple experience counters in a turn.
  • Pestilence + Kelsien. Pestilence is the deck’s repeatable inevitability engine: : 1 damage to each creature and player.` Ping a creature with Kelsien, then Pestilence finishes it (and chips faces). Crypt Rats does the same as a one-shot X-sweeper that can also kill Kelsien-pinged creatures for experience.
  • Deathtouch + Kelsien’s ping. Hired Poisoner, Typhoid Rats, Pharika’s Chosen trade up in combat; the death triggers feed experience when Kelsien softened them first.
  • Bladed Pinions / Whispersilk Cloak. Once Kelsien is a fat experience-grown threat, give him flying+first strike or unblockable to close. Vigilance means he keeps pinging while attacking.
  • Edicts beat hexproof/big single threats Kelsien’s targeted ping can’t touch — Diabolic Edict, Cruel Edict, Geth’s Verdict, Fleshbag Marauder.

Role breakdown (with counts)

  • Lands — 37 (18 nonbasic fixing lands + 19 basics: 7 Plains / 6 Swamp / 6 Mountain)
  • Ramp / fixing rocks — 10 (Arcane Signet, Commander’s Sphere, Manalith, Rakdos/Boros/Orzhov Signet, Mind Stone, Prophetic Prism, Chromatic Star, Wayfarer’s Bauble) — all double as color fixing
  • Card advantage — 11 (Palace Sentinels, Thorn of the Black Rose, Garrulous Sycophant, Crimson Fleet Commodore, Staunch Throneguard [monarch package], Read the Bones, Sign in Blood, Night’s Whisper, Phyrexian Rager, Costly Plunder, Syphon Mind)
  • Spot removal / interaction — 17 (Lightning Strike, Galvanic Blast, Flame Slash, Fire Prophecy, Twin Bolt, Abrade, Terminate, Last Gasp, Disfigure, Tragic Slip, Murder, Bake into a Pie, Snuff Out + edicts: Diabolic Edict, Cruel Edict, Geth’s Verdict, Fleshbag Marauder)
  • Mass / pseudo-wipes — 5 (Pestilence, Crypt Rats, Drown in Sorrow, Eyeblight Massacre, Electrickery)
  • Pingers / payoffs / recursion / finishers — rest (Forge Devil, Frostling, Mogg Fanatic, Footlight Fiend, Goblin Javelineer, Rakdos Ickspitter [pingers]; Gravedigger, Unearth, Doomed Dissenter, Festering Mummy, Crow of Dark Tidings [recursion/value]; Marauding Blight-Priest, Gray Merchant of Asphodel, Vampiric Link [drain]; Bladed Pinions, Whispersilk Cloak [evasion]; Hired Poisoner, Typhoid Rats, Pharika’s Chosen [deathtouch])

Manabase / fixing note

No common land taps for R/W/B on demand, so fixing leans on Command Tower + Path of Ancestry (any commander color), all three guildgates and a stack of pair taplands, three any-color utility lands (Crumbling Vestige, Crystal Grotto, Painted Bluffs), and 10 mana rocks (six of them any-color or pair-fixing). ~17-18 dedicated fixing sources beyond basics make the three colors reliably castable.

Pilot notes

  • Lead on fixing; this is a tapland-heavy base, so sequence your tapped duals on turns you aren’t casting.
  • Hold Kelsien until you can immediately use his tap — and try to have a way to finish whatever you ping so you bank experience, not just damage.
  • Don’t overextend into your own wipes; Kelsien survives Drown/Eyeblight at 3 toughness +experience, but your small pingers don’t. Use directional wipes (Electrickery hits only creatures you don’t control; Eyeblight spares nothing — sequence accordingly).
  • Monarch is your engine — grab it early with Palace Sentinels/Thorn and defend the crown with pingers and Kelsien.
  • Gray Merchant + Marauding Blight-Priest + Vampiric Link give a drain backup if the board stalls.

Weaknesses

  • Tapland-heavy mana can stumble on explosive starts; mulligan no-fixing hands aggressively.
  • Light on hard card-draw bursts beyond the black “draw 2, lose 2” trio — if monarch gets contested you can run low.
  • No counterspells (not available at common in these colors) — you’re reactive on the board, not the stack, so fast combo can outrun you.
  • Single-target ping is only 1 damage; large hexproof/indestructible threats need the edict subpackage, which is finite.

Decklist

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

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