Average Deck for Altaïr, Brotherhood Mentor - Commander Matters
Original Name:
Kelsien, the PlagueKelsien, the Plague
Altaïr, Brotherhood Mentor
Rank #404
20decks

Nov 20, 2025
Rebuilding Kelsien, the Plague with Avatar: The Last Airbender Eternal
Avatar: The Last Airbender is bringing back experience counters, and that means that we can revamp Kelsien, the Plague.

Nov 14, 2025
Fire and Ice: Which Cards are Hot and Cold for Nov. 14?
Let's see which cards are heating up and cooling down for Kelsien and Aminatou, the Fateshifter, on this week's Fire and Ice.
Average Decklist
- 1 Altaïr, Brotherhood MentorAltaïr, Brotherhood Mentor
- 1 Arcane SignetArcane Signet
- 1 Aspect of GorgonAspect of Gorgon
- 1 Axgard ArmoryAxgard Armory
- 1 Basilisk CollarBasilisk Collar
- 1 Battlefield ForgeBattlefield Forge
- 1 Bojuka BogBojuka Bog
- 1 Boros CharmBoros Charm
- 1 Boros SignetBoros Signet
- 1 Buried RuinBuried Ruin
- 1 Caves of KoilosCaves of Koilos
- 1 Clifftop RetreatClifftop Retreat
- 1 Command TowerCommand Tower
- 1 Crackling DoomCrackling Doom
- 1 DesparkDespark
- 1 Dragonskull SummitDragonskull Summit
- 1 DrumbellowerDrumbellower
- 1 Enlightened TutorEnlightened Tutor
- 1 Ertha Jo, Frontier MentorErtha Jo, Frontier Mentor
- 1 Exotic OrchardExotic Orchard
- 1 Falthis, Shadowcat FamiliarFalthis, Shadowcat Familiar
- 1 Fighter ClassFighter Class
- 1 Forbidden OrchardForbidden Orchard
- 1 Forge AnewForge Anew
- 1 General's EnforcerGeneral's Enforcer
- 1 Generous GiftGenerous Gift
- 1 Gift of DoomGift of Doom
- 1 Godless ShrineGodless Shrine
- 1 Gorgon's HeadGorgon's Head
- 1 Harvester of SoulsHarvester of Souls
- 1 Humble DefectorHumble Defector
- 1 Isolated ChapelIsolated Chapel
- 1 Kalemne, Disciple of IroasKalemne, Disciple of Iroas
- 1 Lae'zel, Vlaakith's ChampionLae'zel, Vlaakith's Champion
- 1 Loran's EscapeLoran's Escape
- 1 Magda, the HoardmasterMagda, the Hoardmaster
- 1 Maha, Its Feathers NightMaha, Its Feathers Night
- 1 Mari, the Killing QuillMari, the Killing Quill
- 1 Minthara, Merciless SoulMinthara, Merciless Soul
- 1 Mirrodin AvengedMirrodin Avenged
- 1 Morbid OpportunistMorbid Opportunist
- 1 Mother of RunesMother of Runes
- 4 MountainMountain
- 1 Night's WhisperNight's Whisper
- 1 Nomad OutpostNomad Outpost
- 1 Open the ArmoryOpen the Armory
- 1 Orzhov SignetOrzhov Signet
- 1 Otharri, Suns' GloryOtharri, Suns' Glory
- 1 Painful TruthsPainful Truths
- 1 Path of AncestryPath of Ancestry
- 1 Patriar's SealPatriar's Seal
- 4 PlainsPlains
- 1 Puresteel PaladinPuresteel Paladin
- 1 Quietus SpikeQuietus Spike
- 1 Rakdos SignetRakdos Signet
- 1 Rogue's PassageRogue's Passage
- 1 Ruinous UltimatumRuinous Ultimatum
- 1 Rune of MortalityRune of Mortality
- 1 Sacred FoundrySacred Foundry
- 1 Savai TriomeSavai Triome
- 1 Sevinne's ReclamationSevinne's Reclamation
- 1 Shay CormacShay Cormac
- 1 Sigarda's AidSigarda's Aid
- 1 Sign in BloodSign in Blood
- 1 Slaughter SpecialistSlaughter Specialist
- 1 Smoldering MarshSmoldering Marsh
- 1 Smothering TitheSmothering Tithe
- 1 Sol RingSol Ring
- 1 Spectator SeatingSpectator Seating
- 1 Steelshaper's GiftSteelshaper's Gift
- 1 Sting, the Glinting DaggerSting, the Glinting Dagger
- 1 Stoneforge MysticStoneforge Mystic
- 1 Stroke of MidnightStroke of Midnight
- 1 Sulfurous SpringsSulfurous Springs
- 1 Sun TitanSun Titan
- 5 SwampSwamp
- 1 Swiftfoot BootsSwiftfoot Boots
- 1 Swords to PlowsharesSwords to Plowshares
- 1 Talisman of HierarchyTalisman of Hierarchy
- 1 Talisman of IndulgenceTalisman of Indulgence
- 1 TerminateTerminate
- 1 Termination FacilitatorTermination Facilitator
- 1 Thornbite StaffThornbite Staff
- 1 Thousand-Year ElixirThousand-Year Elixir
- 1 VandalblastVandalblast
- 1 Vault of ChampionsVault of Champions
- 1 Vault of the ArchangelVault of the Archangel
- 1 Void BeckonerVoid Beckoner
- 1 Vorpal SwordVorpal Sword
- 1 You Are Already DeadYou Are Already Dead
Drumbellower
Drumbellower
Ertha Jo, Frontier Mentor
Ertha Jo, Frontier Mentor
Falthis, Shadowcat Familiar
Falthis, Shadowcat Familiar
General's Enforcer
General's Enforcer
Harvester of Souls
Harvester of Souls
Humble Defector
Humble Defector
Kalemne, Disciple of Iroas
Kalemne, Disciple of Iroas
Lae'zel, Vlaakith's Champion
Lae'zel, Vlaakith's Champion
Magda, the Hoardmaster
Magda, the Hoardmaster
Maha, Its Feathers Night
Maha, Its Feathers Night
Mari, the Killing Quill
Mari, the Killing Quill
Minthara, Merciless Soul
Minthara, Merciless Soul
Morbid Opportunist
Morbid Opportunist
Mother of Runes
Mother of Runes
Otharri, Suns' Glory
Otharri, Suns' Glory
Puresteel Paladin
Puresteel Paladin
Shay Cormac
Shay Cormac
Slaughter Specialist
Slaughter Specialist
Stoneforge Mystic
Stoneforge Mystic
Sun Titan
Sun Titan
Termination Facilitator
Termination Facilitator
Void Beckoner
Void Beckoner
Instants (11)
Boros Charm
Boros Charm
Crackling Doom
Crackling Doom
Despark
Despark
Enlightened Tutor
Enlightened Tutor
Generous Gift
Generous Gift
Loran's Escape
Loran's Escape
Mirrodin Avenged
Mirrodin Avenged
Stroke of Midnight
Stroke of Midnight
Swords to Plowshares
Swords to Plowshares
Terminate
Terminate
You Are Already Dead
You Are Already Dead
Sorceries (8)
Night's Whisper
Night's Whisper
Open the Armory
Open the Armory
Painful Truths
Painful Truths
Ruinous Ultimatum
Ruinous Ultimatum
Sevinne's Reclamation
Sevinne's Reclamation
Sign in Blood
Sign in Blood
Steelshaper's Gift
Steelshaper's Gift
Vandalblast
Vandalblast
Artifacts (16)
Arcane Signet
Arcane Signet
Basilisk Collar
Basilisk Collar
Boros Signet
Boros Signet
Gorgon's Head
Gorgon's Head
Orzhov Signet
Orzhov Signet
Patriar's Seal
Patriar's Seal
Quietus Spike
Quietus Spike
Rakdos Signet
Rakdos Signet
Sol Ring
Sol Ring
Sting, the Glinting Dagger
Sting, the Glinting Dagger
Swiftfoot Boots
Swiftfoot Boots
Talisman of Hierarchy
Talisman of Hierarchy
Talisman of Indulgence
Talisman of Indulgence
Thornbite Staff
Thornbite Staff
Thousand-Year Elixir
Thousand-Year Elixir
Vorpal Sword
Vorpal Sword
Enchantments (7)
Aspect of Gorgon
Aspect of Gorgon
Fighter Class
Fighter Class
Forge Anew
Forge Anew
Gift of Doom
Gift of Doom
Rune of Mortality
Rune of Mortality
Sigarda's Aid
Sigarda's Aid
Smothering Tithe
Smothering Tithe
Lands (22)
Axgard Armory
Axgard Armory
Battlefield Forge
Battlefield Forge
Bojuka Bog
Bojuka Bog
Buried Ruin
Buried Ruin
Caves of Koilos
Caves of Koilos
Clifftop Retreat
Clifftop Retreat
Command Tower
Command Tower
Dragonskull Summit
Dragonskull Summit
Exotic Orchard
Exotic Orchard
Forbidden Orchard
Forbidden Orchard
Godless Shrine
Godless Shrine
Isolated Chapel
Isolated Chapel
Nomad Outpost
Nomad Outpost
Path of Ancestry
Path of Ancestry
Rogue's Passage
Rogue's Passage
Sacred Foundry
Sacred Foundry
Savai Triome
Savai Triome
Smoldering Marsh
Smoldering Marsh
Spectator Seating
Spectator Seating
Sulfurous Springs
Sulfurous Springs
Vault of Champions
Vault of Champions
Vault of the Archangel
Vault of the Archangel
Basics (3)
Mountain
4 Mountains
Plains
4 Plains
Swamp
5 Swamps