Art by Jeremy Paillotin
Saved commander deck
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.
Prompt: 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.
Commander
1 cards
Rex, Cyber-Hound
{1}{W}{U}Legendary Artifact Creature — Robot Dog
Chosen commander for the requested strategy.
Ramp
8 cards
Thought Vessel
{2}Artifact
Provides mana ramp and eliminates maximum hand size restriction
Card Draw
10 cards
Fact or Fiction
{3}{U}Instant
digs deep and puts key creatures into the graveyard
Frantic Search
{2}{U}Instant
free card selection that discards high-value target creatures
Thirst for Knowledge
{2}{U}Instant
draws three and discards artifact creatures for Rex
Consider
{U}Instant
cheap cantrip that can put creatures straight to the graveyard
Thought Scour
{U}Instant
Fills graveyards with potential brain counter targets while replacing itself
Otherworldly Gaze
{U}Instant
Allows precise graveyard setup for Rex and can be cast from graveyard
Thirst for Discovery
{2}{U}Instant
Instant-speed card filtering to pitch creatures into the graveyard
Kefnet the Mindful
{2}{U}Legendary Creature — God
Indestructible threat with an activated card draw engine Rex can copy
Removal
9 cards
Generous Gift
{2}{W}Instant
versatile answer to problematic lands, enchantments, or planeswalkers
Stroke of Midnight
{2}{W}Instant
Versatile targeted removal for nonland permanents
Vanquish the Horde
{6}{W}{W}Sorcery
Cheap board wipe when the battlefield is wide
Threats/Wincons
21 cards
Arcanis the Omnipotent
{3}{U}{U}{U}Legendary Creature — Wizard
gives Rex the ability to tap and draw three cards
Aetherling
{4}{U}{U}Creature — Shapeshifter
gives Rex exile protection, unblockability, and power pumping
Electrostatic Pummeler
{3}Artifact Creature — Construct
uses Rex's energy reserve to double its power repeatedly
Ertai, Wizard Adept
{2}{U}Legendary Creature — Human Wizard
turns Rex into a repeatable spell counter on a stick
Memnarch
{7}Legendary Artifact Creature — Wizard
gives Rex the ability to turn permanents into artifacts and steal them
Morphling
{3}{U}{U}Creature — Shapeshifter
gives untap, flying, shroud, and stats tweaking to Rex
Soul of New Phyrexia
{6}Artifact Creature — Phyrexian Avatar
gives Rex a team-wide indestructible activation
Steel Overseer
{2}Artifact Creature — Construct
taps Rex to put +1/+1 counters on artifact creatures
Steel Hellkite
{6}Artifact Creature — Dragon
selective board wiping based on damage dealt
Walking Ballista
{X}{X}Artifact Creature — Construct
allows Rex to gain counters and ping targets directly
Solemn Simulacrum
{4}Artifact Creature — Golem
value body that ramps on entry and draws on death
Wurmcoil Engine
{6}Artifact Creature — Phyrexian Wurm
resilient threat that leaves deathtouch and lifelink tokens
Myr Welder
{3}Artifact Creature — Myr
backup commander effect that imprints artifact abilities
Phyrexian Metamorph
{3}{U/P}Artifact Creature — Phyrexian Shapeshifter
flexible clone for any creature or artifact on the board
Esper Sentinel
{W}Artifact Creature — Human Soldier
early scaling threat that taxes opponent noncreature spells
Burnished Hart
{3}Artifact Creature — Elk
sacrifices for basic land ramp and can be copied or reanimated
Heliod, God of the Sun
{3}{W}Legendary Enchantment Creature — God
Grants vigilance and provides an activated mana sink to create tokens
Windreaver
{3}{W}{U}Creature — Elemental
Offers four distinct activated abilities for Rex to gain evasion and survival
Aetherstorm Roc
{2}{W}{W}Creature — Bird
Generates energy on creature entry and uses energy to tap down potential blockers
Aethergeode Miner
{1}{W}Creature — Dwarf Scout
Generates energy on attack and provides a cheap flicker activated ability
Mirror Entity
{2}{W}Creature — Shapeshifter
Activated ability that acts as a potent finisher for the board
Utility
14 cards
Swiftfoot Boots
{2}Artifact — Equipment
protects Rex with hexproof and gives haste
Aetherworks Marvel
{4}Legendary Artifact
leverages energy generated by Rex to cast spells for free
Mother of Runes
{W}Creature — Human Cleric
Provides Rex protection or evasion via a valuable tap ability
Giver of Runes
{W}Creature — Kor Cleric
Gives Rex or key artifacts protection from chosen colors or colorless
Selfless Spirit
{1}{W}Creature — Spirit Cleric
Grants board indestructible via an activated ability Rex can also adopt
Master Transmuter
{3}{U}Artifact Creature — Human Artificer
Activated ability allows bouncing and cheating powerful artifacts into play
Eldrazi Displacer
{2}{W}Creature — Eldrazi
Activated flicker ability provides protection and re-triggers enter-the-battlefield abilities
Trading Post
{4}Artifact
Toolbox artifact offering four different activated abilities for value
Staff of Domination
{3}Artifact
Versatile activated ability engine for untapping, life gain, and card draw
Gonti's Aether Heart
{6}Legendary Artifact
Generates massive energy on artifact entry and offers an extra turn ability
Sun Titan
{4}{W}{W}Creature — Giant
Recurs key low-cost artifacts and creatures directly to the battlefield
Sevinne's Reclamation
{2}{W}Sorcery
Efficient permanent recursion with flashback value
Planar Bridge
{6}Legendary Artifact
High-impact activated ability that tutors any permanent straight to the battlefield
