Zhulodok, Void Gorger costs {5}{C} and is a 7/4. Colorless spells you cast from your hand with mana value 7 or greater have "Cascade, cascade." Each huge Eldrazi you cast from your hand is two free spells, and the deck is built from colorless cards, so most of them qualify.

The precon already has the huge Eldrazi, including Kozilek, the Great Distortion, Darksteel Monolith, Flayer of Loyalties and It That Betrays. Each swap below pairs a cut with an add, and every card is scored with the same numbers the Oracle uses to build decks: synergy and inclusion from the Zhulodok decks, plus lift, which shows how much more often a card turns up in Zhulodok decks than in decks that could play it.

Looking for the unmodified list first? Read the Eldrazi Unbound precon guide.

13
Swaps
$45.75
Cost of the adds
38→38
Lands
2→33
Avg Oracle score

What is holding the deck back

Not enough colorless engines

It That Heralds the End, Glaring Fleshraker, Echoes of Eternity and Sanctum of Ugin cheapen, copy and fetch colorless spells with mana value 7 or more. They are among the top-scoring cards the precon leaves out.

Cheap X creatures that do not cascade

Endless One, Hangarback Walker, Stonecoil Serpent and Omarthis cost a variable amount and only cascade if you pay an X of 7 or more. None of them is a card Zhulodok decks usually play.

Utility cards that do little

Myriad Construct, Scaretiller, Suspicious Bookcase, Fireshrieker and Investigator's Journal do nothing for the plan, and none of them is played in more than about one Zhulodok deck in twelve.

The 13 swaps

Each pair shows the numbers for the card coming out and the card going in. Click a card image to zoom.

Swap 1 of 13
Endless One
Cut
Endless One
Creature — Eldrazi · X
Not a card this commander's decks usually play, so it scores below the cards that are
It That Heralds the End
Add
It That Heralds the End
Creature — Eldrazi Drone · 1C
Inclusion66%
Synergy25%
Lift1.6×
Oracle score 42

Endless One is an X creature with no cost except X. It is not a card Zhulodok decks usually play.

It That Heralds the End is a 2/2 for {1}{C}. Colorless spells you cast with mana value 7 or greater cost {1} less, and your other colorless creatures get +1/+1. A two-drop that discounts the cascade spells and grows the team. It is one of the top-scoring cards the precon leaves out.

Swap 2 of 13
Hangarback Walker
Cut
Hangarback Walker
Artifact Creature — Construct · XX
Not a card this commander's decks usually play, so it scores below the cards that are
Glaring Fleshraker
Add
Glaring Fleshraker
Creature — Eldrazi Drone · 2C
Inclusion69%
Synergy9%
Lift1.1×
Oracle score 33

Hangarback Walker is an X creature that makes Thopters when it dies. It is not a card Zhulodok decks usually play.

Glaring Fleshraker is a 2/2 for {2}{C}. Whenever you cast a colorless spell it makes a 0/1 Eldrazi Spawn, and whenever another colorless creature enters it deals 1 damage to each opponent. Every cascaded spell is a Spawn and a ping.

Swap 3 of 13
Myriad Construct
Cut
Myriad Construct
Artifact Creature — Construct · 4
Not a card this commander's decks usually play, so it scores below the cards that are
Echoes of Eternity
Add
Echoes of Eternity
Kindred Enchantment — Eldrazi · 3CCC
Inclusion79%
Synergy13%
Lift1.2×
Oracle score 39

Myriad Construct is a four-mana 4/4 Construct that gets counters for nonbasic lands. It is not a card Zhulodok decks usually play.

Echoes of Eternity costs {3}{C}{C}{C}. Whenever you cast a colorless spell you copy it, and triggers of colorless spells and permanents happen an additional time. Cascade is a triggered ability, so Zhulodok's double cascade triggers an additional time too.

Swap 4 of 13
Omarthis, Ghostfire Initiate
Cut
Omarthis, Ghostfire Initiate
Legendary Creature — Spirit Snake · XX
Not a card this commander's decks usually play, so it scores below the cards that are
Breaker of Creation
Add
Breaker of Creation
Creature — Eldrazi · 6CC
Inclusion37%
Synergy16%
Lift1.8×
Oracle score 25

Omarthis, Ghostfire Initiate is an X creature that grows with counters on other colorless creatures. It is not a card Zhulodok decks usually play.

Breaker of Creation is an 8/4 for {6}{C}{C} with hexproof from each color and annihilator 2. When you cast it you gain 1 life for each colorless permanent you control. A mana value 8 colorless creature that cascades twice and cannot be targeted by any colored spell.

Swap 5 of 13
Scaretiller
Cut
Scaretiller
Artifact Creature — Scarecrow · 4
Not a card this commander's decks usually play, so it scores below the cards that are
Ulamog's Crusher
Add
Ulamog's Crusher
Creature — Eldrazi · 8
Inclusion26%
Synergy14%
Lift2.1×
Oracle score 19

Scaretiller is a four-mana 1/4 that returns lands when it taps. It is not a card Zhulodok decks usually play.

Ulamog's Crusher is an 8/8 for {8} with annihilator 2 that attacks each combat. A mana value 8 colorless creature, so it cascades twice, and it is among the cheapest in the deck's top end.

Swap 6 of 13
Stonecoil Serpent
Cut
Stonecoil Serpent
Artifact Creature — Snake · X
Not a card this commander's decks usually play, so it scores below the cards that are
Desolation Twin
Add
Desolation Twin
Creature — Eldrazi · 10
Inclusion27%
Synergy13%
Lift1.9×
Oracle score 19

Stonecoil Serpent is an X creature with reach, trample and protection from multicolored. It is not a card Zhulodok decks usually play.

Desolation Twin is a 10/10 for {10}. When you cast it, you create a 10/10 colorless Eldrazi token. A mana value 10 colorless spell that cascades twice and makes two 10/10s.

Swap 7 of 13
Suspicious Bookcase
Cut
Suspicious Bookcase
Artifact Creature — Wall · 2
Not a card this commander's decks usually play, so it scores below the cards that are
Sanctum of Ugin
Add
Sanctum of Ugin
Land
Inclusion63%
Synergy25%
Lift1.7×
Oracle score 40

Suspicious Bookcase is a two-mana 0/4 defender that makes a creature unblockable for {3}. It is not a card Zhulodok decks usually play.

Sanctum of Ugin is a land that taps for {C}. Whenever you cast a colorless spell with mana value 7 or greater, you may sacrifice it to search your library for a colorless creature card. A land that fetches the next huge Eldrazi, and it takes no spell slot.

Swap 8 of 13
Fireshrieker
Cut
Fireshrieker
Artifact — Equipment · 3
Inclusion8%
Synergy2%
Lift1.4×
Oracle score 5
Ultima, Origin of Oblivion
Add
Ultima, Origin of Oblivion
Legendary Creature — God · 5
Inclusion52%
Synergy9%
Lift1.2×
Oracle score 27

Fireshrieker is a three-mana Equipment that gives double strike. It is played in about one Zhulodok deck in twelve.

Ultima, Origin of Oblivion is a 4/4 flier for {5}. Whenever it attacks you put a blight counter on a land that turns it into a colorless mana land, and whenever you tap a land for {C} you add an additional {C}. Every colorless land makes more colorless mana.

Swap 9 of 13
Steel Hellkite
Cut
Steel Hellkite
Artifact Creature — Dragon · 6
Inclusion16%
Synergy-2%
Lift0.9×
Oracle score 5
Pathrazer of Ulamog
Add
Pathrazer of Ulamog
Creature — Eldrazi · 11
Inclusion44%
Synergy24%
Lift2.3×
Oracle score 32

Steel Hellkite is a six-mana 5/5 flying Dragon. It is played in about one Zhulodok deck in six, and with mana value 6 it does not cascade.

Pathrazer of Ulamog is a 9/9 for {11} with annihilator 3 that cannot be blocked except by three or more creatures. A mana value 11 colorless creature that cascades twice.

Swap 10 of 13
Investigator's Journal
Cut
Investigator's Journal
Artifact — Book Clue · 2
Inclusion12%
Synergy8%
Lift2.8×
Oracle score 9
Devourer of Destiny
Add
Devourer of Destiny
Creature — Eldrazi · 5CC
Inclusion23%
Synergy13%
Lift2.3×
Oracle score 17

Investigator's Journal is a two-mana Clue-like artifact that draws cards for {2}. It is played in about one Zhulodok deck in eight.

Devourer of Destiny is a 6/6 for {5}{C}{C}. When you cast it you exile target permanent that is one or more colors, and from your opening hand it digs through the top four cards at your first upkeep. A mana value 7 colorless creature that removes a coloured permanent and cascades twice.

Swap 11 of 13
Duplicant
Cut
Duplicant
Artifact Creature — Shapeshifter · 6
Not a card this commander's decks usually play, so it scores below the cards that are
Ulamog, the Ceaseless Hunger
Add
Ulamog, the Ceaseless Hunger
Legendary Creature — Eldrazi · 10
Inclusion78%
Synergy41%
Lift2.1×
Oracle score 56

Duplicant is a six-mana artifact creature that exiles a nontoken creature. It is not a card Zhulodok, and with mana value 6 it does not cascade decks usually play.

Ulamog, the Ceaseless Hunger is a 10/10 indestructible legendary Eldrazi for {10}. When you cast it you exile two target permanents, and when it attacks the defending player exiles the top twenty cards of their library. A mana value 10 colorless creature that cascades twice. It is the highest-scoring card the precon leaves out.

Swap 12 of 13
Phyrexian Triniform
Cut
Phyrexian Triniform
Artifact Creature — Phyrexian Golem · 9
Not a card this commander's decks usually play, so it scores below the cards that are
Conduit of Ruin
Add
Conduit of Ruin
Creature — Eldrazi · 6
Inclusion68%
Synergy34%
Lift2.0×
Oracle score 47

Phyrexian Triniform is a nine-mana 9/9 that leaves three 3/3 Golems when it dies. It is not a card Zhulodok decks usually play.

Conduit of Ruin is a 5/5 for {6}. When you cast it you may search your library for a colorless creature with mana value 7 or greater and put it on top, and your first creature spell each turn costs {2} less. It finds the next cascade spell.

Swap 13 of 13
Ancient Stone Idol
Cut
Ancient Stone Idol
Artifact Creature — Golem · 10
Inclusion16%
Synergy5%
Lift1.4×
Oracle score 9
Emrakul, the World Anew
Add
Emrakul, the World Anew
Legendary Creature — Eldrazi · 12
Inclusion49%
Synergy26%
Lift2.1×
Oracle score 35

Ancient Stone Idol is a ten-mana 12/12 flash creature that costs less for each attacker. It is played in about one Zhulodok deck in six.

Emrakul, the World Anew is a 12/12 for {12} with flying and protection from spells and from permanents cast this turn. When you cast it you gain control of all creatures target player controls. A mana value 12 creature that cascades twice and steals a board.

The full swap list

Cut

  • Endless One
  • Hangarback Walker
  • Myriad Construct
  • Omarthis, Ghostfire Initiate
  • Scaretiller
  • Stonecoil Serpent
  • Suspicious Bookcase
  • Fireshrieker
  • Steel Hellkite
  • Investigator's Journal
  • Duplicant
  • Phyrexian Triniform
  • Ancient Stone Idol

Add

  • It That Heralds the End
  • Glaring Fleshraker
  • Echoes of Eternity
  • Breaker of Creation
  • Ulamog's Crusher
  • Desolation Twin
  • Sanctum of Ugin
  • Ultima, Origin of Oblivion
  • Pathrazer of Ulamog
  • Devourer of Destiny
  • Ulamog, the Ceaseless Hunger
  • Conduit of Ruin
  • Emrakul, the World Anew

What to keep

These cards are doing the deck's heavy lifting. Do not cut them.

If you want to spend more

These are strong but sit outside a budget upgrade. Prices are the cheapest paper printing.

The verdict

Eldrazi Unbound already has the huge Eldrazi. The upgrade is cheap colorless engines and more spells with mana value 7 or more for Zhulodok to cascade, in place of X creatures and utility cards that do nothing for the plan. These thirteen swaps cost about $46 in total.

Want a full 100-card list built around Zhulodok, Void Gorger from today's data?

Build with The Oracle →

Frequently asked questions

What are the best upgrades for the Eldrazi Unbound precon?

Using data from 21,645 Zhulodok decks, the highest-scoring additions are Ulamog, the Ceaseless Hunger (for Duplicant), Conduit of Ruin (for Phyrexian Triniform) and It That Heralds the End (for Endless One). The full list has 13 swaps, each scored with synergy, inclusion and lift.

How much does it cost to upgrade Eldrazi Unbound?

All 13 swaps cost about $45.75 at the cheapest paper printings (TCGplayer market prices via Scryfall, 2026-10-27). If you want to spend more, the guide also covers Basalt Monolith ($3.88) and Kozilek's Command ($6.95).

What should I cut from Eldrazi Unbound?

The weakest cards for this commander are Endless One, Hangarback Walker and Myriad Construct. The guide explains the reason for every cut, and swaps each one for a card that scores higher.

Which cards should I keep in Eldrazi Unbound?

Keep Kozilek, the Great Distortion, Darksteel Monolith, Flayer of Loyalties, It That Betrays and Not of This World. These are the cards doing the deck's heavy lifting.

What does Zhulodok do?

Zhulodok, Void Gorger costs {5}{C} and is a 7/4. Colorless spells you cast from your hand with mana value 7 or greater have "Cascade, cascade." Each huge Eldrazi you cast from your hand is two free spells, and the deck is built from colorless cards, so most of them qualify.

More Commander Masters upgrade guides

All precon upgrade guides

How the numbers work

Inclusion is the share of Zhulodok, Void Gorger decks (21,645 of them when this was written, 2026-10-27) that play the card. Synergy is how much more often they play it than other decks in the same colours. Oracle score is synergy × 0.6 plus inclusion × 0.4, the same blend The Oracle uses to rank cards for a deck. Lift compares how often the card appears in these decks with how often it could, capped at 8× here; it is shown for context and does not change the score.

Two cautions. Players who run the precon unmodified count as Zhulodok decks, which flatters every card the precon contains. Lift is low for most of these cards because they are played in nearly every colorless deck, so use synergy and inclusion to compare cards, not lift. A card the commander's decks do not usually play counts as 0 in the average score. Prices are the cheapest non-foil paper printing on TCGplayer (via Scryfall), in USD, and move daily.