Art by Jeremy Paillotin
Commander deckUW
Rex, Cyber-Hound
Fill graveyards using targeted graveyard setup like Entomb and Buried Alive, then use Rex, Cyber-Hound to exile key creatures with brain counters to gain powerful activated abilities. Protect Rex with hexproof/indestructible abilities while accumulating energy to control the board and win through versatile combat or ability engines.
Asked for“Build a complete 100-card Commander deck with Rex, Cyber-Hound as the commander, targeting Bracket 3 power level. The deck should feel like a well-designed, upgraded precon: consistent, synergistic, interactive, and able to win games without relying on cEDH-level optimization. Focus on Rex’s ability to exile creatures from graveyards with brain counters and gain their activated abilities. Include creatures with useful activated abilities, Energy support, graveyard setup, artifact synergy, protection for Rex, ramp, card draw, removal, board wipes, and recursion. Avoid infinite combos, excessive tutors, oppressive stax, and fast mana such as Mana Crypt. Use a stable mana base and realistic card ratios. Prioritize cards that remain useful even without Rex. Provide exactly 100 cards including the commander, organized by category, with a short explanation of the deck’s main game plan and win conditions.”
Deck anatomy
What this list actually runs on: how cheaply it casts things, and whether it has enough ramp, card draw and interaction to keep up at the table. Each block is one card — hover for its name.
Mana curve · 62 nonland cards
The working parts
Counted from Scryfall’s community card tags, not from the builder’s own labels. A card that does two jobs counts twice, so these add up to more than the deck. The hatched band is a common rule of thumb, not a law — combo decks run leaner, battlecruiser decks heavier.
Colored mana symbols
Commander
1Rex, Cyber-Hound
1WULegendary Artifact Creature — Robot Dog
Chosen commander for the requested strategy.
Ramp
8
Thought Vessel
2Artifact
Provides mana ramp and eliminates maximum hand size restriction
Card Draw
10
Frantic Search
2UInstant
free card selection that discards high-value target creatures
Thirst for Knowledge
2UInstant
draws three and discards artifact creatures for Rex
Thought Scour
UInstant
Fills graveyards with potential brain counter targets while replacing itself
Otherworldly Gaze
UInstant
Allows precise graveyard setup for Rex and can be cast from graveyard
Thirst for Discovery
2UInstant
Instant-speed card filtering to pitch creatures into the graveyard
Kefnet the Mindful
2ULegendary Creature — God
Indestructible threat with an activated card draw engine Rex can copy
Removal
9
Generous Gift
2WInstant
versatile answer to problematic lands, enchantments, or planeswalkers
Threats/Wincons
21
Arcanis the Omnipotent
3UUULegendary Creature — Wizard
gives Rex the ability to tap and draw three cards
Aetherling
4UUCreature — Shapeshifter
gives Rex exile protection, unblockability, and power pumping
Electrostatic Pummeler
3Artifact Creature — Construct
uses Rex's energy reserve to double its power repeatedly
Ertai, Wizard Adept
2ULegendary Creature — Human Wizard
turns Rex into a repeatable spell counter on a stick
Memnarch
7Legendary Artifact Creature — Wizard
gives Rex the ability to turn permanents into artifacts and steal them
Morphling
3UUCreature — Shapeshifter
gives untap, flying, shroud, and stats tweaking to Rex
Soul of New Phyrexia
6Artifact Creature — Phyrexian Avatar
gives Rex a team-wide indestructible activation
Steel Overseer
2Artifact Creature — Construct
taps Rex to put +1/+1 counters on artifact creatures
Steel Hellkite
6Artifact Creature — Dragon
selective board wiping based on damage dealt
Walking Ballista
XXArtifact Creature — Construct
allows Rex to gain counters and ping targets directly
Solemn Simulacrum
4Artifact Creature — Golem
value body that ramps on entry and draws on death
Wurmcoil Engine
6Artifact Creature — Phyrexian Wurm
resilient threat that leaves deathtouch and lifelink tokens
Myr Welder
3Artifact Creature — Myr
backup commander effect that imprints artifact abilities
Phyrexian Metamorph
3UPArtifact Creature — Phyrexian Shapeshifter
flexible clone for any creature or artifact on the board
Esper Sentinel
WArtifact Creature — Human Soldier
early scaling threat that taxes opponent noncreature spells
Burnished Hart
3Artifact Creature — Elk
sacrifices for basic land ramp and can be copied or reanimated
Heliod, God of the Sun
3WLegendary Enchantment Creature — God
Grants vigilance and provides an activated mana sink to create tokens
Windreaver
3WUCreature — Elemental
Offers four distinct activated abilities for Rex to gain evasion and survival
Aetherstorm Roc
2WWCreature — Bird
Generates energy on creature entry and uses energy to tap down potential blockers
Aethergeode Miner
1WCreature — Dwarf Scout
Generates energy on attack and provides a cheap flicker activated ability
Mirror Entity
2WCreature — Shapeshifter
Activated ability that acts as a potent finisher for the board
Utility
14
Aetherworks Marvel
4Legendary Artifact
leverages energy generated by Rex to cast spells for free
Mother of Runes
WCreature — Human Cleric
Provides Rex protection or evasion via a valuable tap ability
Giver of Runes
WCreature — Kor Cleric
Gives Rex or key artifacts protection from chosen colors or colorless
Selfless Spirit
1WCreature — Spirit Cleric
Grants board indestructible via an activated ability Rex can also adopt
Master Transmuter
3UArtifact Creature — Human Artificer
Activated ability allows bouncing and cheating powerful artifacts into play
Eldrazi Displacer
2WCreature — Eldrazi
Activated flicker ability provides protection and re-triggers enter-the-battlefield abilities
Trading Post
4Artifact
Toolbox artifact offering four different activated abilities for value
Staff of Domination
3Artifact
Versatile activated ability engine for untapping, life gain, and card draw
Gonti's Aether Heart
6Legendary Artifact
Generates massive energy on artifact entry and offers an extra turn ability
Sun Titan
4WWCreature — Giant
Recurs key low-cost artifacts and creatures directly to the battlefield
Sevinne's Reclamation
2WSorcery
Efficient permanent recursion with flashback value
Planar Bridge
6Legendary Artifact
High-impact activated ability that tutors any permanent straight to the battlefield
