Ulalek, Fused Atrocity costs {C/W}{C/U}{C/B}{C/R}{C/G}, so each part can be paid with its colour or with colourless mana. Whenever you cast an Eldrazi spell, you may pay {C}{C}; if you do, you copy all spells you control, then copy all other activated and triggered abilities you control. One big Eldrazi becomes two.

The precon already has the big Eldrazi and the colourless payoffs, including Glaring Fleshraker, Forsaken Monument and Ugin, the Ineffable. 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 Ulalek decks, plus lift, which shows how much more often a card turns up in Ulalek decks than in decks that could play it.

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

13
Swaps
$40.19
Cost of the adds
38→38
Lands
19→53
Avg Oracle score

What is holding the deck back

Not enough colourless engines

Echoes of Eternity, It That Heralds the End, Herald of Kozilek and Thran Dynamo all reward or cheapen colourless spells. They are among the top-scoring cards the precon leaves out.

Cards that do little for the plan

Suffer the Past, Ugin's Insight, Idol of Oblivion and Mutated Cultist are each played in about one Ulalek deck in four or fewer, and Suffer the Past in far fewer.

Too many two-colour and top-heavy cards

Ulamog's Nullifier and Angelic Aberration need specific colours, and Elder Deep-Fiend costs eight. Twenty-two nonland cards have a mana value of six or more.

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
Suffer the Past
Cut
Suffer the Past
Instant · XB
Inclusion6%
Synergy6%
Lift8.0×+
Oracle score 6
Echoes of Eternity
Add
Echoes of Eternity
Kindred Enchantment — Eldrazi · 3CCC
Inclusion83%
Synergy78%
Lift8.0×+
Oracle score 80

Suffer the Past is an X graveyard-exile spell that drains one life per card. It is played in about one Ulalek deck in sixteen.

Echoes of Eternity costs {3}{C}{C}{C}. Whenever you cast a colorless spell you copy it, and triggered abilities of your colorless spells and permanents trigger an additional time. Add Ulalek's copies and every colourless spell you cast can come out several times over. It is the highest-scoring card the precon leaves out.

Swap 2 of 13
Ugin's Insight
Cut
Ugin's Insight
Sorcery · 3UU
Inclusion14%
Synergy13%
Lift8.0×+
Oracle score 13
It That Heralds the End
Add
It That Heralds the End
Creature — Eldrazi Drone · 1C
Inclusion69%
Synergy65%
Lift8.0×+
Oracle score 67

Ugin's Insight costs five: it scries by the greatest mana value among your permanents and draws three. It is played in about one Ulalek deck in seven.

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 big Eldrazi and grows the team.

Swap 3 of 13
Ulamog's Nullifier
Cut
Ulamog's Nullifier
Creature — Eldrazi Processor · 2UB
Inclusion16%
Synergy15%
Lift8.0×+
Oracle score 15
Ugin's Binding
Add
Ugin's Binding
Instant · 2U
Inclusion56%
Synergy53%
Lift8.0×+
Oracle score 54

Ulamog's Nullifier is a 2/3 flash flier for {2}{U}{B} whose counter needs two cards from exile. It is played in about one Ulalek deck in six.

Ugin's Binding costs {2}{U} at instant speed and returns a nonland permanent you do not control to its owner's hand. Whenever you cast a colorless spell with mana value 7 or greater, you may exile it from your graveyard to bounce every nonland permanent you do not control.

Swap 4 of 13
Vile Redeemer
Cut
Vile Redeemer
Creature — Eldrazi · 2G
Inclusion19%
Synergy17%
Lift8.0×+
Oracle score 18
Herald of Kozilek
Add
Herald of Kozilek
Creature — Eldrazi Drone · 1UR
Inclusion48%
Synergy45%
Lift8.0×+
Oracle score 46

Vile Redeemer is a 3/3 flash creature for {2}{G} that makes Scions for creatures that died this turn if you pay {C}. It is played in about one Ulalek deck in five.

Herald of Kozilek is a 2/4 for {1}{U}{R} and colorless spells you cast cost {1} less. Every Eldrazi and colourless artifact is cheaper, so Ulalek's {C}{C} copy is easier to pay for.

Swap 5 of 13
Mutated Cultist
Cut
Mutated Cultist
Creature — Eldrazi Horror · 2B
Inclusion25%
Synergy24%
Lift8.0×+
Oracle score 24
Sowing Mycospawn
Add
Sowing Mycospawn
Creature — Eldrazi Fungus · 3G
Inclusion51%
Synergy48%
Lift8.0×+
Oracle score 49

Mutated Cultist is a 1/3 deathtouch for {2}{B} that removes counters when you cast it. Counters are not a theme of this deck, and it is played in about one Ulalek deck in four.

Sowing Mycospawn is a 3/3 for {3}{G}. When you cast it you search for a land and put it onto the battlefield, and if it was kicked for {1}{C} you also exile a land. Ramp that fetches a Wastes or a utility land and is a spell for Ulalek to copy.

Swap 6 of 13
Idol of Oblivion
Cut
Idol of Oblivion
Artifact · 2
Inclusion20%
Synergy18%
Lift8.0×+
Oracle score 19
Thran Dynamo
Add
Thran Dynamo
Artifact · 4
Inclusion52%
Synergy48%
Lift8.0×+
Oracle score 50

Idol of Oblivion draws a card only if you created a token this turn, and its 10/10 costs {8} plus a sacrifice. It is played in about one Ulalek deck in five.

Thran Dynamo costs {4} and taps for {C}{C}{C}. Colourless mana pays for the big Eldrazi and for Ulalek's {C}{C}, and it is a colourless spell for Echoes of Eternity.

Swap 7 of 13
Angelic Aberration
Cut
Angelic Aberration
Creature — Eldrazi Angel · 5W
Inclusion21%
Synergy20%
Lift8.0×+
Oracle score 20
Kozilek's Unsealing
Add
Kozilek's Unsealing
Enchantment · 2U
Inclusion68%
Synergy64%
Lift8.0×+
Oracle score 65

Angelic Aberration is a 4/4 flying vigilance creature for {5}{W} that only turns small creatures into 4/4s. It is played in about one Ulalek deck in five.

Kozilek's Unsealing costs {2}{U}. Whenever you cast a creature spell with mana value 4, 5 or 6 you create two Eldrazi Spawn, and with mana value 7 or greater you draw three cards. Most of your creatures are those, and Ulalek's copy triggers it twice.

Swap 8 of 13
Elder Deep-Fiend
Cut
Elder Deep-Fiend
Creature — Eldrazi Octopus · 8
Inclusion21%
Synergy20%
Lift8.0×+
Oracle score 20
Nulldrifter
Add
Nulldrifter
Creature — Eldrazi Elemental · 7
Inclusion50%
Synergy46%
Lift8.0×+
Oracle score 47

Elder Deep-Fiend is an 8-mana 5/6 flash creature that taps up to four permanents when you cast it. It is played in about one Ulalek deck in five.

Nulldrifter is a 4/4 flying creature for {7} that draws two cards when you cast it, with annihilator 1 and evoke {2}{U}. A colourless spell with mana value 7, so Ulalek copies the draw.

Swap 9 of 13
Sifter of Skulls
Cut
Sifter of Skulls
Creature — Eldrazi · 3B
Inclusion21%
Synergy19%
Lift8.0×+
Oracle score 20
Path of Annihilation
Add
Path of Annihilation
Enchantment · 3G
Inclusion55%
Synergy51%
Lift8.0×+
Oracle score 52

Sifter of Skulls is a 4/3 for {3}{B} that makes a Scion when another nontoken creature of yours dies. It is played in about one Ulalek deck in five.

Path of Annihilation costs {3}{G}. It makes two Eldrazi Spawn, your Eldrazi tap for mana of any colour, and you gain 4 life whenever you cast a creature spell with mana value 7 or greater. It fixes the colours for the whole deck.

Swap 10 of 13
Inversion Behemoth
Cut
Inversion Behemoth
Creature — Eldrazi · 2CC
Inclusion18%
Synergy18%
Lift8.0×+
Oracle score 18
Eldrazi Linebreaker
Add
Eldrazi Linebreaker
Creature — Eldrazi · 1CR
Inclusion25%
Synergy24%
Lift8.0×+
Oracle score 24

Inversion Behemoth is a 2/9 for {2}{C}{C} that switches power and toughness at the beginning of combat. It is played in about one Ulalek deck in five.

Eldrazi Linebreaker is a 3/3 trampler for {1}{C}{R}. At the beginning of combat on your turn, a creature you control gains haste and +X/+0, where X is the number of Eldrazi you control. A three-drop that makes any big Eldrazi hit hard the turn it lands.

Swap 11 of 13
Imprisoned in the Moon
Cut
Imprisoned in the Moon
Enchantment — Aura · 2U
Inclusion26%
Synergy24%
Lift8.0×+
Oracle score 25
Conduit of Ruin
Add
Conduit of Ruin
Creature — Eldrazi · 6
Inclusion56%
Synergy53%
Lift8.0×+
Oracle score 54

Imprisoned in the Moon is a three-mana Aura that turns a creature, land or planeswalker into a colourless land. It is played in about one Ulalek deck in four.

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. A colourless spell that finds the next Eldrazi for Ulalek to copy.

Swap 12 of 13
Skittering Invasion
Cut
Skittering Invasion
Kindred Sorcery — Eldrazi · 7
Inclusion26%
Synergy24%
Lift8.0×+
Oracle score 25
Kozilek, the Great Distortion
Add
Kozilek, the Great Distortion
Legendary Creature — Eldrazi · 8CC
Inclusion51%
Synergy48%
Lift8.0×+
Oracle score 49

Skittering Invasion is a seven-mana sorcery that makes five Eldrazi Spawn. It is played in about one Ulalek deck in four.

Kozilek, the Great Distortion is a 12/12 with menace for {8}{C}{C}. When you cast it, you draw cards if you have fewer than seven in hand, and by discarding a card of the same mana value you can counter a spell. Ulalek copies it, so you draw twice.

Swap 13 of 13
Crib Swap
Cut
Crib Swap
Kindred Instant — Shapeshifter · 2W
Inclusion29%
Synergy25%
Lift7.0×
Oracle score 27
Ulamog, the Defiler
Add
Ulamog, the Defiler
Legendary Creature — Eldrazi · 10
Inclusion57%
Synergy54%
Lift8.0×+
Oracle score 55

Crib Swap is a three-mana instant that exiles a creature. It is played in about one Ulalek deck in three.

Ulamog, the Defiler is a 7/7 for {10}. When you cast it, a target opponent exiles the top half of their library, it has ward-sacrifice two permanents, and it enters with counters equal to the greatest mana value in exile and annihilator equal to its counters. A colourless finisher, and the most expensive swap in this guide.

The full swap list

Cut

  • Suffer the Past
  • Ugin's Insight
  • Ulamog's Nullifier
  • Vile Redeemer
  • Mutated Cultist
  • Idol of Oblivion
  • Angelic Aberration
  • Elder Deep-Fiend
  • Sifter of Skulls
  • Inversion Behemoth
  • Imprisoned in the Moon
  • Skittering Invasion
  • Crib Swap

Add

  • Echoes of Eternity
  • It That Heralds the End
  • Ugin's Binding
  • Herald of Kozilek
  • Sowing Mycospawn
  • Thran Dynamo
  • Kozilek's Unsealing
  • Nulldrifter
  • Path of Annihilation
  • Eldrazi Linebreaker
  • Conduit of Ruin
  • Kozilek, the Great Distortion
  • Ulamog, the Defiler

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 Incursion already has the big Eldrazi and the colourless payoffs. The upgrade is cheap colourless engines that copy, discount and ramp, in place of coloured cards the deck struggles to cast and a few that almost nobody plays. These thirteen swaps cost about $40 in total.

Want a full 100-card list built around Ulalek, Fused Atrocity from today's data?

Build with The Oracle →

Frequently asked questions

What are the best upgrades for the Eldrazi Incursion precon?

Using data from 28,035 Ulalek decks, the highest-scoring additions are Echoes of Eternity (for Suffer the Past), It That Heralds the End (for Ugin's Insight) and Kozilek's Unsealing (for Angelic Aberration). The full list has 13 swaps, each scored with synergy, inclusion and lift.

How much does it cost to upgrade Eldrazi Incursion?

All 13 swaps cost about $40.19 at the cheapest paper printings (TCGplayer market prices via Scryfall, 2026-10-27). If you want to spend more, the guide also covers Emrakul, the World Anew ($6.88).

What should I cut from Eldrazi Incursion?

The weakest cards for this commander are Suffer the Past, Ugin's Insight and Ulamog's Nullifier. 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 Incursion?

Keep Glaring Fleshraker, Forsaken Monument, All Is Dust, Eldritch Immunity and Ugin, the Ineffable. These are the cards doing the deck's heavy lifting.

What does Ulalek do?

Ulalek, Fused Atrocity costs {C/W}{C/U}{C/B}{C/R}{C/G}, so each part can be paid with its colour or with colourless mana. Whenever you cast an Eldrazi spell, you may pay {C}{C}; if you do, you copy all spells you control, then copy all other activated and triggered abilities you control. One big Eldrazi becomes two.

More Modern Horizons 3 Commander upgrade guides

All precon upgrade guides

How the numbers work

Inclusion is the share of Ulalek, Fused Atrocity decks (28,035 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 Ulalek decks, which flatters every card the precon contains. Lift is very high for many colourless cards because they are rarely played outside Eldrazi decks, so use lift to compare cards, not to judge one in isolation. Prices are the cheapest non-foil paper printing on TCGplayer (via Scryfall), in USD, and move daily.